Simply click on any subject area to jump to that section.

• Product Information
• System Requirements
• Netscape Navigator Features
  • Security Features
• Netscape Navigator for Windows
• Netscape Navigator for X
• Netscape Navigator for Macintosh

PRODUCT INFORMATION

1. What is Netscape Navigator?
2. What's the difference between Netscape Navigator 1.0 and Netscape Navigator 1.1b1?
3. What makes Netscape Navigator different from other browsers?
4. How can I get a copy of Netscape Navigator?
5. Is it easy to configure Netscape Navigator?

1. What type of computer/software do I need to use Netscape Navigator?
2. What type of modem do I need to use Netscape Navigator?
3. What type of Internet account/Access do I need to use Netscape Navigator?
4. What other software do I need to use Netscape Navigator?
5. What external viewers exist and where can I get them?

1. Does Netscape Navigator offer integrated e-mail and newsgroups?
2. Does Netscape Navigator support personal signature files?
3. Does Netscape Navigator support real-time, on-the-fly decoding of audio or video files?
4. Why do my images come out with dots or speckles on them?
5. How does memory caching work in Netscape Navigator?
6. Is there a way to import hotlists from NCSA Mosaic as Netscape Navigator bookmarks?
7. Does Netscape Navigator support XPM images?
8. Why do I get the error panel "Cannot connect to host"?
9. Why can't Netscape Navigator sometimes look up Internet hosts?
10. Does Netscape Navigator support SOCKS?
11. Does Netscape Navigator support proxies?
12. Why do I have to re-enter my user ID and password for the proxy with each HTTP connection I attempt to make? Shouldn't this information be retained for the entire session?
13. I have more than 100 entries in my bookmark list and the pull-down menu goes off the bottom of the screen. Is there a way to set the number of bookmarks displayed?
14. Is it possible for me to save an image that is part of an HTML page?
15. Is there a way to include the document text in either indented or nonindented styles when mailing it from Netscape Navigator?
16. Is there a TCP/IP stack built into Netscape Navigator?
17. Where can I find a list of known bugs for Netscape Navigator?
18. What HTML extensions are available in Netscape Navigator?
19. How do I get WAIS requests to work with Netscape Navigator?

1. Does Netscape Navigator work with Windows NT?
2. Does Netscape Navigator work with Windows for Workgroups?
3. How can I specify the SOCKS host for Netscape Navigator for Windows?
4. Which Winsock software does Netscape Navigator for Windows work with?
5. Can I use the INI files from my NCSA Mosaic for Windows with Netscape Navigator for Windows?

1. How do I set the default window SIZE under the X Window System?
2. How do I make mailcap or MIME files for the X Window version of Netscape Navigator?
3. Could you explain why Netscape Navigator running on my Sun workstation has occasional problems with the display setting? Other programs don't have these problems.
4. What causes Netscape Navigator to generate the following error under OpenWindows Sun windowing system?

   Warning:
   Name: toText
   Class:XmTextField
   Character 'c', not supported in Font. Discarded.

5. Why does the AIX version of Netscape Navigator fails to start due to errors regarding _XmStrings undefined?
6. Why doesn't my Backspace key work in text fields?
7. I have an external viewer that produces a lot of output, and the subprocess diagnostics window keeps popping to the front. How do I make it stop?

1. Is there a native PowerPC version of Netscape Navigator?
2. Does Netscape Navigator support AppleScript and Drag and Drop?
3. How do the modifier keys work in Netscape Navigator?
4. What should I do if the Preferences window is too large for my Macintosh screen?
5. Why can't I select text on a grayscale monitor?
6. Why am I getting so many "Unable to locate host" error messages while using Netscape Navigator for Macintosh?
7. Why does Netscape Navigator 1.0 for Macintosh generate errors if I click on the Stop button?

What is Netscape Navigator?

Netscape Navigator is a network navigator that allows retrieval and viewing of World Wide Web multimedia documents. It is compatible with NCSA Mosaic and is designed to provide the next generation of performance and ease-of-use.

Some Netscape Navigator features include:

• Performance tuned for 14.4-Kbps modems
• Progressive rendering, allowing for simultaneous text and image
• downloading
• Native in-line JPEG, GIF, and XBM image support
• Scrolling with continuous display of documents as they load
• Security features that offer private communications with certified servers
• Multiple independent windows
• Superior Usenet/NNTP interface

What's the difference between Netscape Navigator 1.1b1 and the original version Netscape Navigator 1.0?

On March 6, Netscape released the first beta version of a Netscape Navigator update, version 1.1b1. Copies of this beta release automatically expire on April 1. A second beta release is scheduled for the last week of March. The shipping version, Netscape Navigator 1.1, is scheduled to be released between April 15-30. You can get further information in the News and Reference section.

When Netscape Navigator 1.1 is released, we will begin a separate FAQ for that version.

Some of the features in this beta release include:

• Support for 32-bit MS Windows (Windows NT and Windows95) and Macintosh PowerPC.
• Advanced layout capabilities using HTML 3.0 tables and graphical backdrops.
• NCAPI, providing remote-control and interapplication-communication capabilities via OLE/DDE on Windows, Apple Events on Macintosh, and X Events on UNIX.
• Dynamic document updating, which enables Netscape Navigator to display continuously or regularly updated information such as stock quotes, weather maps, and other dynamic data.
• Additional security options, including an enhanced U.S.-only version with nonexportable encryption technology.
• Enhanced Usenet news interface, including hierarchical newsgroup browsing and searching, optimizations for low-bandwidth connections, and transparent Multipurpose Internet Mail Extensions (MIME) messaging handling for multimedia and hypermedia news postings.
• Performance increases, especially for cached pages
• Many bug fixes

What makes Netscape Navigator different from other browsers?

Netscape Navigator has been built specifically to provide superior performance over other browsers.

A few of the important enhancements:

• You can see and interact with the document as it loads.
• Multiple images and text can all load at the same time.
• JPEG images are supported, to improve performance.
• Document and image caching reduce network traffic.
• The graphical user interface is tuned for ease of use.
• Advanced features include hierarchical bookmarks and a configurable graphical user interface.

How can I get a copy of Netscape Navigator?

You can download a copy of Netscape Navigator for evaluation or for unlimited use in academic or not-for-profit environments.

If you wish to purchase Netscape Navigator and associated support for ongoing use, you can order it directly from Netscape Communications Corporation. Send e-mail to sales@netscape.com and you'll get an automated reply with purchasing information.

You can also find more information about the various support and training programs we offer under Company and Products.

Is it easy to configure Netscape Navigator?

Yes. Installing Netscape Navigator is very simple, and, once installed, personal options and preferences are easily managed by way of the easy-to-use graphical interface.

What type of computer/software do I need to use Netscape Navigator?

Netscape Navigator can operate in any of the following environments:

• Intel (x86-based)
  • Windows 3.1
  • Windows for Workgroups 3.11
  • Windows 95
  • Windows NT

• Apple Macintosh
  • Macintosh System 7 (or above)
  • MacOS
  • PowerPC

• Unix
  • Digital Equipment Corporation Alpha (OSF/1 2.0)
  • Hewlett-Packard 700 series(HP-UX 1.1)
  • Silicon Graphics (IRIX 5.2)
  • IBM RS6000 (AIX 3.2)
  • Sun SPARC (Solaris, SunOS 4.1.3)

System Requirements:

	    Processor   Disk   RAM (Min.)   RAM (Rec.)
	    ---------   ----   ----------   ----------
Windows       386SX     1MB        4MB          8MB
Macintosh     68030     2MB        4MB          8MB
UNIX           N/A      3MB       16MB         16MB

What type of modem do I need to use Netscape Navigator?

We recommend using a 14.4-Kbps (or faster) modem. Netscape Navigator will also work at 9600 bps.

What type of Internet account/Access do I need to use Netscape Navigator?

To make the best use of Netscape Navigator, your service provider must allow access to the many World Wide Web servers on the Internet through a SLIP or PPP account. (PPP is a newer protocol and is considered better than SLIP). Talk to your Internet provider if you are unsure about your available access capabilities.

Netscape Navigator works with either SLIP or PPP Internet access protocols.

What other software do I need to use Netscape Navigator?

Netscape Navigator for Windows requires a Winsock TCP/IP stack; the Macintosh version requires MacTCP. Depending on your method of access to the Internet, other utilities may be required. Your Internet access provider can fully explain particular software needs and help you configure your system for Netscape Navigator.

Once installed and configured, Netscape Navigator is a fully integrated Web browser, newsgroup reader, and FTP utility.

While not required to run, Netscape Navigator uses various "helper applications" for displaying audio, video, and other types of files. Options for using these applications can be configured in your Preferences window. For help configuring this window, take a look at our on-line manual documentation.

What helper applications exist and where can I get them?

On the Macintosh: StuffitExpander, JPEGView, SoundMachine, SoundApp, MacBinaryII+, Mactar, MacGzip, and Sparkle are all downloadable applications. There are several popular FTP sites for Macintosh software, including ftp://sumex-aim.stanford.edu and ftp://wuarchive.wustl.edu. You can look at the Macintosh Helpers page for more information.

On Windows: LVIEW31.EXE (for JPEG images), MPEGPLAY.EXE (for MPEG movies), and MPLAYER.EXE (for audio files) are all useful applications. The main site for these is ftp://ftp.cica.indiana.edu.

Depending on the UNIX platform on which you are running X Window, you will need to use different applications. We have a sample mailcap file for SGI workstations that demonstrates a typical SGI configuration for helper applications.

You can also find an evolving list of sites with helper applications under Helper Applications.

All helper applications are configured through the Preferences panel under the Options menus. For more information, check the documentation in our on-line manual.

Does Netscape Navigator offer integrated e-mail and newsgroups?

You can get more information about Usenet news in our Helper Applications documentation.

If you already have an account on a mail server (ask your network administrator or Internet service provider), then Netscape Navigator will allow you to send Internet e-mail directly from the browser window; you cannot read or receive mail in Netscape Navigator and should continue to use your normal e-mail program for those functions.

Does Netscape Navigator support signature files?

Version 1.0 does not support signature files; versions 1.1b1 and later do support signature files.

Does Netscape Navigator support real-time, on-the-fly decoding of audio or video files?

The X Window System version of Netscape Navigator can download a file by either waiting until the entire file is received and then launching the external helper application or by launching the external software and sending data to the helper app as it arrives from the network. The Windows and Macintosh versions only support the former method.

If you have a program on your X Window platform that can accept streaming audio input (there is currently no program for streaming video), it can be used to listen to audio streaming in from Internet in real time. Check out our page on how to configure helper applications for more information.

Why do my images come out with dots or speckles on them?

Netscape Navigator offers in-line image support for GIF, JPEG, and XBM (X bitmap) formats, so you can view displayed images in place, as the page author intended, without relying on a separate or additional utility or helper application.

Netscape Navigator's routines for displaying images rely on technology that intelligently translates image colors (when necessary) into those available on your system. If your system's color support doesn't match that of the image, images may look speckled.

You can turn off dithering in the Preferences dialog box under the Options menu; JPEG images, however, will always be dithered.

How does memory caching work in Netscape Navigator?

Netscape Navigator uses a memory cache for encoded images and text; you can configure the SIZE of this cache in the Preferences dialog box under the Options menu. The cache is persistent, meaning that files are kept locally on your machine for fast browsing. You can clear the cache at any time in the Cache and Network dialog box under Preferences in the Options menu.

When you go back to a page, in-line images will be subsequently decoded from memory rather than received again from the network. There is no caching of decoded images, because the encoded images are smaller (in the case of JPEGs, much smaller) than pixel maps. If you click on a link to a page that is in the cache, Netscape Navigator checks with the server to see if the page has changed before pulling it from the cache. (If it hasn't, the page is not downloaded and the memory cache version is used.)

If you use the Back button to go to a page, however, you will access the version in the memory cache. This makes sense: If you want the latest version of a page, click on the link; if you want the last version you saw, use the View History option under the Go menu.

Is there a way to import hotlists from NCSA Mosaic as Netscape Navigator bookmarks?

Yes! Netscape Navigator bookmarks come with an Import command that will read any HTML file containing links and turn those links into entries in the bookmarks list. Convert your current hotlists to HTML and then click the Import option in the View Bookmarks window. (If you need help, read through our documentation regarding the Bookmarks dialog box)

If you are running NCSA Mosaic for X Window System, the easiest way to import hotlists into Netscape Navigator is to use the included hot-convert.sh shell script. When you run that script, it will read in your xmosaic hotlist and append the contents to your Netscape Navigator bookmarks file. Then simply restart Netscape Navigator.

You can also bring up your hotlist dialog box in NCSA Mosaic for X Window System and choose the Mail To command. Mail the hotlist to yourself; it arrives in HTML format. In addition you can use the hl2html (that is, "hotlist to HTML") utility to convert your hotlist to HTML.

If you're using NCSA Mosaic for Windows, use the WinH2htm (Windows hotlist to HTML) utility.

If you're using NCSA Mosaic for Macintosh, there is a utility called HHConv, a HyperCard stack that will take you through the process of turning your hotlist into HTML.

Does Netscape Navigator support XPM (X pixie map) images?

No.

Why do I get the error panel, "Cannot connect to host"?

This error might have several causes, including any of the following:

1. Your system might be behind a firewall. If it is, you need access to a SOCKS or proxy server to connect to an Internet host. Check with your network administrator to get the details of the SOCKS or proxy server being used.
2. The host you are trying to connect to may be down.
3. You may be having problems with your SLIP or PPP connection. Contact your Internet service provider or network administrator.
4. If you are on a Windows machine, your winsock may not support asynchronous DNS, so you should try changing the line

   ASYNC DNS = YES
   to
   ASYNC DNS = NO

   in your NETSCAPE.INI file.

Why can't Netscape Navigator sometimes look up Internet hosts?

This can happen if your computer or workstation is behind a firewall and your system administrator has configured your network in a fashion that doesn't allow Netscape Navigator to communicate with outside networks.

In an X Window System environment, Netscape Navigator may sometimes fail to look up hosts because your system uses YP/NIS exclusively for hostname mapping or your system administrator doesn't allow DNS lookups to work through your firewall. (Netscape Navigator requires the standard DNS name service for it to translate host names to IP addresses. If your site does run DNS somewhere, you can use a workaround by specifying the host that has the DNS information in the socks_ns environment variable. Note that the specification must indicate the IP address of the host, not its name.)

Netscape Navigator for SunOS 4.x currently includes two sets of executables - one that uses YP/NIS and one that uses DNS only.

On the Macintosh, take a look at MacTCP 2.0.6 documentation.

Does Netscape Navigator support SOCKS?

Yes, Netscape Navigator supports version 4 of SOCKS. It uses the protocol as defined by the socks.cstc.4.1 implementation.

You can set the SOCKS host by opening the Preferences window under Options, selecting the Mail and Proxies page, and editing the SOCKS host and SOCKS port number. Restart Netscape Navigator after doing this (the options will save automatically). There is a limitation in the current implementation - Netscape Navigator doesn't understand the @ syntax present in SOCKS configuration files.

In the 1.0 Windows version, the SOCKS host can only be specified in the INI file. The format in the INI file is:

[Services]
SOCKS_Server=mysocks.domain.com

In Windows versions 1.1b1 and later, the SOCKS proxy can be set under the Proxies option in the Preferences dialog box under the Options menu.

Does Netscape Navigator support proxies?

Yes. You can choose the proxy host by selecting the Preferences option under the Options menu. Once the Preferences window appears, select the Proxies page and enter the list of proxy hosts and port numbers. Don't forget to save your options. The proxy should be in effect for the next request.

Why do I have to re-enter my user ID and password for the proxy with each HTTP connection I attempt to make? Shouldn't this information be retained for the entire session?

Ideally, the client should not be able to authenticate itself to the proxy server using HTTP username/password authorization, because only one authorization response can be sent in any one request. It is therefore impossible for the client to authenticate itself to both the proxy server and a server beyond the proxy. If you want to authenticate your proxy users, you must use IP-address authentication.

Some other browsers allow you to perform your access authorization without re-entering the ID and password - but this could constitute a security risk.

I have more than 100 entries in my bookmarks list and the pull-down menu goes off the bottom of the screen. Is there a way to set the number of bookmarks displayed?

No. You can, however, adjust the layout of the bookmarks list by creating categories.

Bring up the View Bookmarks dialog box. Position your cursor above the first bookmark you wish to categorize and click on New Header to insert a bolded subject header in the list. In the text field to the right, give it a name. Next, select the bookmark under the new header and click on the large Up arrow; the bookmark will indent to show you that it's now active under the new header. Continue on down the list, selecting and clicking on the Up arrow, indenting all the bookmarks you want under that subject header. Repeat this process for all your bookmarks, adding subject headers where appropriate. When you're done, close the View Bookmarks window. When you next hold down the Bookmarks menu option above the main browser window, you should see a list of your new headers with arrows indicating the submenus that contain your individual bookmarks.

Is it possible for me to save an image that is part of an HTML page that I'm viewing?

Netscape Navigator 1.0 does not support this. Versions 1.1b1 and later have a new pop-up menu that allows you to save an individual image. To access the pop-up menu on the Windows or X Window platforms, press and hold down the right mouse button over an image. On the Macintosh, hold down the mouse button for about one second and the pop-up menu will appear.

Is there a way to include document text from a Web page in either indented or nonindented styles while mailing it from Netscape Navigator?

Yes. Simply click the Include Document Text button in the Mail Document dialog box under the File menu. Each line of text will be indented and preceded by a right carat (>).

In Netscape Navigator for Macintosh, you can alternately select Text in the Mail Document window's Attach pull-down menu. This option will MIME encapsulate the text with Content-Type: text/plain, giving the user on the other end the ability to extract the original, unaltered document.

In Netscape Navigator for X Window System, you have the option of using Attach: Text, Attach: Source, or Attach: PostScript.

Do you have a TCP/IP stack built into Netscape Navigator?

No.

Where can I find a list of known bugs for Netscape Navigator?

Release Notes for Netscape Navigator for Windows and Netscape Navigator for X Window System can be accessed from the Help menu.

Netscape Navigator for Macintosh makes the Release Notes available under both System 7's Balloon Help and Netscape Navigator's Help menu.

What HTML extensions are available in Netscape Navigator?

Netscape has many HTML extensions available for Netscape Navigator.

How do I get WAIS requests to work with Netscape Navigator?

You must use a WAIS proxy. Open the Preferences window under the Options menu and select Proxies to set your WAIS proxy.

The CERN httpd proxy server supports WAIS; if you use it to get through your firewall, you can use WAIS URLs under Netscape Navigator. In addition, you can use it as your WAIS proxy even if you don't have a firewall.

Also note that WAIS is generally accessed through a gateway. WAIS, Inc., for example, gives its customers gateway software. You can also find out more information about freeWAIS.

Does Netscape Navigator work with Windows NT?

In our tests, Netscape Navigator version 1.0 works with Windows NT 3.5 (except on DEC platforms). All versions of Windows NT are supported under Netscape Navigator versions 1.1b1 and later.

Does Netscape Navigator work with Windows for Workgroups?

Yes. We have tested Netscape Navigator with Windows for Workgroups 3.11. Please note that the Wolverine TCP/IP stack doesn't support a dial-up connection to the Internet.

How can I specify the SOCKS host for Netscape Navigator for Windows?

In the 1.0 Windows version, the SOCKS host can only be specified in the INI file. The format in the INI file is:

[Services]
		SOCKS_Server=mysocks.domain.com

In the 1.1 Windows version, the SOCKS proxy can be set using the Proxies option in the Preferences dialog box under the Options menu.

Which Winsock software does Netscape Navigator for Windows work with?

Netscape Navigator should work with the following:

• Trumpet Winsock 2.0e
• FTP Software PC/TCP
• NetManage
• Microsoft Windows For Workgroups (Wolverine) (Note: This software doesn't support modem connections to the Internet)
• Microsoft Windows NT

We've heard particularly positive reports from customers using the Trumpet Winsock 2.0e, available at ftp.cdrom.com/.5/cica/winsock and ftp.trumpet.com.au/ftp/pub/winsock. Download the file called twsk20e.zip.

Can I use the INI files from my NCSA Mosaic for Windows with Netscape Navigator for Windows?

Yes. You can copy your MOSAIC.INI file to a NETSCAPE.INI file.

When you do this, however, watch out for a few things: Be sure to add fields for History File and File Location. Be sure to convert your NCSA Mosaic Hotlist entries to Netscape Navigator Bookmarks.

How do I set the default window SIZE on the X platform?

To set the default SIZE of the window, use the command-line option

-geometry =620x950+630+40

or the X resource

Netscape.TopLevelShell.geometry: =620x950+630+40

How do I make a mailcap file or a MIME file for the X Window version of Netscape Navigator?

This document explain all there is to know about mailcap files. On a related subject, check out our documentation on Mime Types.

Could you explain why Netscape Navigator running on my Sun platform has occasional problems with $display setting? Other programs don't have these problems.

This could be due to DNS/YP loss. The $display contains a hostname that Netscape can't resolve. Use the IP number rather than the hostname to work around this problem.

What causes Netscape Navigator to generate the following error under OpenWindows?

Warning:
	Name: toText
		Class:XmTextField
		Character 'c', not supported in Font. Discarded.

This is a bug in the OpenWindows X server that causes it to pick FONTs which are only 1 pixel high, making text fields unusable. We do not yet know of a reliable workaround.

Why does the AIX version of Netscape Navigator fail to start with errors about _XmStrings undefined?

This version of Netscape Navigator was linked against AIX X11R5 and Motif 1.2. You are probably running X11R4 and/or Motif 1.1. The suggested solution is to upgrade to a more recent version of the operating system.

Why doesn't my Backspace key work in text fields?

Linux and or XFree86 come with misconfigured default Backspace and Delete keys. All Motif programs (including, of course, Netscape Navigator) will malfunction in the same way.

The Motif spec says that Backspace is supposed to delete the previous character and Delete is supposed to delete the following character. Linux and XFree86 come configured with both the Backspace and Delete keys generating Delete.

You can fix this by using any one of the xkeycaps, xmodmap, or loadkeys programs to make the key in question generate the Backspace function instead of Delete.

You can also fix it by having a .motifbind file; see the man page for VirtualBindings(3).

Note: Don't use *XmText.translations or *XmTextField.translations. If you do, you will blow away Netscape Navigator's other text-field key bindings.

I have an external viewer that produces a lot of output, and the subprocess diagnostics window keeps popping to the front. How do I make it stop?

The only solution is to force the external viewer to not produce so much output. A well-written viewer will have an option to produce only real errors as output rather than always produce diagnostics that cannot be suppressed.

The mpeg_play program is particularly troublesome. You can solve it by changing your .mailcap file entry from

video/mpeg; mpeg_play %s
to
video/mpeg; mpeg_play %s 2>&1 >/dev/null

This will instruct mpeg_play to discard all of its diagnostic output.

Is there a native PowerPC version of Netscape Navigator?

Yes. Versions 1.1b1 and later can be installed as either 68K, PPC, or fat versions.

Does Netscape Navigator support AppleScript and Drag and Drop?

Version 1.0 supports AppleScript on an experimental basis only; several WWW Apple Events are available in Netscape Navigator's AppleScript dictionary. Versions 1.1b1 and later support AppleScript as described in the Netscape Client Application Programming Interface documentation.

Netscape Navigator versions 1.0 and later are recordable.

Drag and Drop is also being integrated. If you are running System 7.5 or have the Drag Manager extension installed, you can drag a URL into the main window, and it will be loaded. (This feature is especially useful if you are using NewsWatcher as your news reader.) You can also drag a URL out of the History window under the Go menu.

Versions 1.1b1 and later allow you to drag a link out of the Netscape Navigator browser window onto the desktop or into a Finder window. The document referred to by the link you're dragging will be saved to disk.

How do the modifier keys work in Netscape Navigator?

The following modifier keys are supported by Netscape Navigator:

• Page Up, Page Down, up arrow, and down arrow: for scrolling in the main window
• Tab keys: to jump to and from form fields
• Option key: when pressed and clicking on a link, to save the document to disk; and, when pressed and choosing the Open File command, to open any local file (rather than just HTML files)
• Command-left arrow and Command-right arrow are equivalent to the back and forward buttons and menu commands

What should I do if the Preferences window is too large for my Macintosh screen?

Netscape Navigator's Preferences window is too large to fit on SE/30 or Classic II screens. This will be fixed. For now, you can use the Enter key to save the preferences and Esc to cancel your changes - they will activate the invisible buttons.

Why can't I select text on a grayscale monitor?

All text in Netscape Navigator can be selected. If you're using a grayscale display on a Macintosh, you simply may not be able to see the selection, especially if the color you've chosen for selected text is close to our background color, light gray. You can work around this problem by opening your Control Panels and using the Color window to choose an even lighter color, such as yellow, or a darker one, such as red. Even though these colors map to the screen as shades of gray, they are sufficiently lighter or darker for you to tell when you've selected text.

Why am I getting so many "Unable to locate host" error messages while using Netscape Navigator for Macintosh?

Try upgrading your MacTCP to version 2.0.6. Start at Apple's home page or go directly to the networking software updates.

Why does Netscape Navigator 1.0 for Macintosh generate errors if I click on the Stop button?

This is a known problem with Navigator 1.0. If you press the Stop button while Netscape is looking up a host name, error messages (including "Unable to locate host") are displayed and Netscape Navigator stops working correctly. The workaround is to quit Netscape Navigator and restart it.

This problem is fixed in Netscape Navigator 1.1b1 and later.