Mozilla Frequently Asked Questions

Tip: If you are using Mozilla, you can find your topic by simply typing search keyword (e.g. upgrade) directly in the Web page. To repeat a search, press Ctrl+G (Cmd+G on Mac OS X).

General
  1. What is Mozilla?
  2. For whom is Mozilla 1.x intended?
  3. Is Mozilla free?
  4. What features does Mozilla have?
  5. Why are there so many versions of Mozilla? And which one should I choose?
  6. Where can I download language packs or Mozilla in my language?
  7. I cannot find the latest version for Mac OS 9
  8. What are the differences between Mozilla and Netscape 7?
  9. What are the differences between Mozilla and Firefox?
  10. Will Firefox and Thunderbird replace Mozilla Application Suite?
  11. How do I upgrade my version of Mozilla?
  12. Where do I download patches for Mozilla?
  13. Where can I get add-ons for Mozilla functionality?
  14. What keyboard shortcuts are there?
  15. How do I turn on this hidden preference I have heard about?
  16. Does Mozilla include crash recovery?
  17. Can I use AOL Instant Messenger directly in Mozilla, like in Netscape?
  18. Will uninstalling Netscape 4.x affect Mozilla?
Browser
  1. Install Can I install just the browser, not the rest?
  2. System How do I make Mozilla my default browser?
  3. System Why doesn't Mozilla allow me to run an .exe (executable) file directly from an Internet location?
  4. System I just installed Mozilla and now it stole the .jpeg and .gif file associations! (Windows)
  5. Page Display Text zoom does not stick. How do I permenantly enlarge/reduce text size?
  6. Plug-ins What plug-ins does Mozilla support?
  7. Plug-ins How do I control how files are handled by the plug-ins / helper applications
  8. Plug-ins Does Mozilla support ActiveX controls? (Windows)
  9. Plug-ins Mozilla prompts me to download plug-ins all the time. But I don't want to install any plug-in, what do I do?
  10. Plug-ins How do I block flash?
  11. UI I've heard about tabbed browsing. How do I use it?
  12. UI I've heard about popup blocking. How do I do this?
  13. UI Can I control the browser with mouse gestures?
  14. Networking I can only download four files simultaneously.
  15. Networking I'm using dial-up. Can I speed up displaying pages with lots of images?
  16. Networking How do I set up Mozilla to dial (connect) automatically? (Windows)
  17. Networking How do I stop Mozilla from activating the auto-connect? (Windows)
Mail & Newsgroups
  1. Install Can I install just the mail program, not the rest?
  2. System How do I make Mozilla my default mail program?
  3. System Can I use a different mail program with Mozilla?
  4. Account How do I set up multiple SMTP (outgoing) mail servers?
  5. Account I cannot find any place to enter my passwords for my accounts. Where do I enter my passwords?
  6. Security Is Mozilla Mail & Newsgroups susceptible to e-mail viruses?
  7. Security How do I use S/MIME, PGP or GnuPG to send and receive signed or encrypted messages?
  8. Data Migration How do I import e-mail messages from another mail program?
  9. Data Migration How do I export e-mail messages to another mail program or computer?
  10. Data Migration Why didn't Mozilla migrate my Netscape 4.x address book?
  11. Data Migration How do I import or export address books from or to another program?
  12. UI Can I access my Netscape WebMail or Hotmail accounts through Mozilla Mail & Newsgroups?
  13. UI Does Mozilla come with a spellchecker?
  14. UI Is there a mail notifier in Mozilla?
  15. UI Does Mozilla Mail & Newsgroups include a calendar function?
  16. UI How do I make newsgroup names appear expanded, not abbreviated?
  17. News How do I read or post ROT13 in the newsreader?
  18. News How do I re-arrange newsgroup subscription?
Profile & Backup
  1. General What is my profile?
  2. General Can I share a profile with Netscape 7 or with an earlier version of Mozilla?
  3. General How do I set up multiple profiles?
  4. General Where is my profile stored?
  5. General What is the @$%#@$%#.slt directory in my profile directory?
  6. General How do I force Mozilla to open with a specific profile?
  7. General Whenever I try to open a second Mozilla window, I get a warning that the profile is in use. How do I open multiple instances of Mozilla? (Linux)
  8. Data Migration How do I move my Netscape 4.x profile to Mozilla?
  9. Backup & Restore How do I back up my profile data?
  10. Backup & Restore How do I restore my profile data from backup?
  11. Backup & Restore @ Help, my bookmarks are all gone!
  12. Backup & Restore @ My system crashed when I exited Mozilla. Now all my mail are gone. What do I do?
  13. Share How do I transport my profile to a different machine?
  14. Share Does Mozilla support roaming profiles?
  15. Security How do I protect data of my profile (from local machine access)?
Extension & Customizing Mozilla
  1. How do I use different icons for each Mozilla component?
  2. How do I change the splash screen at startup?
  3. Netscape 4 allows you to switch off the pictures in the toolbar buttons. Can I do this in Mozilla?
  4. Can I move the toolbars around?
  5. Can I use RoboForm (form and password manager) with Mozilla?
  6. How do I add/change my search engines?
  7. How do I set up bookmark keywords?
  8. UI How do I change the location of my bookmark
Troubleshooting Mozilla
  1. Browser Why doesn’t my page look right in Mozilla?
  2. Browser I’m trying to view a file on a website, and the address looks correct, but all I see is a bunch of garbled garbage on my screen.
  3. Browser My bank site blocks Mozilla!
  4. Profile & Data I cannot open Mozilla / my profile. Mozilla says the profile is in use.
  5. Profile & Data My system crashed when I exited Mozilla. Now all my mail are gone. What do I do?
  6. Profile & Data My profile is missing (from the Profile Manager), how do I get it back again?
  7. Profile & Data Help, my bookmarks are all gone!
  8. Mail Help! I can’t access my e-mail any more!
  9. Mail My anti-virus program thinks my INBOX has a virus and won’t let me access my INBOX!
  10. Browser Why can’t I access secure (https://) Web sites? (Linux)
  11. Browser I’m using a transparent proxy (such as Junkbuster) and I’m having weird browsing problems. What’s happening?
  12. Browser Middle click (or Ctrl+click) on a link does not open a new tab.
  13. Customization I love a theme I’m using, but weird things are happening with it. Is there a way to fix it?
  14. System I use GNOME. I installed Mozilla from a mozilla.org binary, and now Nautilus isn’t working properly.
  15. Browser My toolbar/menubar is gone! How do I get it back?
  16. Browser My personal toolbar is empty, and I cannot add any bookmarks to it. How do I fix it?
  17. Browser The sidebar comes up empty.
  18. Download I cannot download large files.
  19. Download File downloading has been very slow lately, why?