Shared by eszpee
régi pluginek verziószám-ellenőrzését kikapcsoló trükk - ettől még nem biztos, hogy menni fog, de legalább meg lehet próbálni.

I tried the beta version of Firefox 3 and was disappointed because nearly all of my add-ons were broken and eventually went back to using the stable version 2.

With the release of Firefox 3 RC-1 recently, I was tempted to give it another go. There's some great improvements in the new version, especially the Location Bar or "awesome bar" that learns and personalises from your browsing history. The browser has better performance, better bookmark handling, and full-page warnings about phishing sites. It also has full-page zooming for people like me with poor eye-sight.

I've even been able to get my "can't live without" add-ons to work in the new Firefox 3 by following the instructions from PC World's Neil McAllister, Make Older Add-ons Work with Firefox 3.

The key to the fix is to prevent Firefox from checking its version number before it tries to load extensions. To do this, you will need to set a new preference value. Point your browser at the URL "about:config", then right-click on the preferences list to bring up the contextual menu. You should see an option that says "New." Select that, and choose "Boolean." When it asks you for the preference name, type "extensions.checkCompatibility" (without the quotes). You have to enter the name exactly. For the value, choose "false."

Now restart Firefox. When the browser comes back up, it should give you a warning that version checking is disabled. You can double-check under "Tools:Add-Ons" to make sure everything is activated once again.

If the worst case happens and the browser won't start after you add the new preference, you'll need to remove it by hand. Locate the file "prefs.js" within your Firefox profile directory and edit it with any text file editor to delete the line with the preference you just created. (If you're not comfortable doing that, then as I've said, this fix is probably not for you.)

Also, you'll want to remember to delete the preference once the final version of Firefox 3.0 is released, or else you'll never be certain that your installation is stable.