User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727) Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.7) Gecko/20060909 Firefox/2.0 I installed version 2.0 last night without removing my previous installation of Firefox first. I don't see any bookmarks or the personal toolbar links similar to bug 319196. However, in my installation if I type in a URL into the address bar and hit enter or click the green arrow, or type in a search word in the search bar and click the magnifying glass or hit enter... nothing happens. I can't get any website to load. I tried creating a new profile, but this did not solve the problem. Reproducible: Always Steps to Reproduce: 1. Install a previous build of Firefox (I wish i knew the version) 2. Add some bookmarks and a personal toolbar containing folders. 3. Install version 2.0 of Firefox. Actual Results: Firefox is inoperable. Expected Results: Firefox imports my old bookmarks and actually works. It should have worked.

Does the problem occur if you start Firefox in Safe Mode? http://kb.mozillazine.org/Safe_Mode

I'm not sure now. I uninstalled Firefox 2.0, went into my Program Files\ directory, and deleted the "Mozilla Firefox" directory. I then re-installed Firefox 2.0 and it seems to be working just fine. I'm just having to replace all of my bookmarks/passwords etc. Not too inconvenient for getting to use a great browser. The only other detail I forgot to add is that this computer is a multi-user (home) system, I'm not sure if that would be a significant detail.

I'm suspecting it was one of your extensions that caused the problem, can you remember which ones you had installed?

-Definitely: Adblock https://addons.mozilla.org/firefox/10/ BugMeNot http://roachfiend.com/archives/category/extensions/ PasswordMaker https://addons.mozilla.org/firefox/469/ -Possibly: FlashBlock https://addons.mozilla.org/firefox/433/ FasterFox https://addons.mozilla.org/firefox/433/ I haven't upgraded Firefox on my work computer yet and it has the following extensions: DomInspector, Talkback, ImageZoom, AdBlock, BugMeNot, SearchStatus, IE Tab, Web Developer. I'll install 2.0 on that system and see if any of those common extensions may be the culprit.

I downloaded Firefox 2.0 and installed it on my work computer. During the installation I saw a screen similar to "The following plugins are not compatible with version 2.0". I continued the installation and the program is working fine. The aforementioned screen did not appear when I installed Firefox on my home computer. Possible theory why the home installation failed... the home system was multi-user and one of my family members may have had a Firefox browser open in their workspace?

*** This bug has been marked as a duplicate of 357922 ***