User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13 ( .NET CLR 3.5.30729; .NET4.0E) Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13 ( .NET CLR 3.5.30729; .NET4.0E) Firefox 4 was fresh installed, after Install i changed the start-Url to "google.de" closed Firefox an started again. The start-Url (google) started but not full to end and no Function in Firefox 4 is selectible only the windows Window.Firefox 3.613 is still installed and have no Problems. I tried out with Firefox 4 as Master Browser and not Master, same Failure. Reproducible: Always

Please try http://support.mozilla.com/en-US/kb/Safe+Mode

(In reply to comment #1) > Please try http://support.mozilla.com/en-US/kb/Safe+Mode found the error: it is in the ad on Module McAfee Site Advisor

McAfee are working on an updated version of their Site Advisor extension, to prevent the issues it causes with Firefox. To help work out what versions of the extension don't work (for the purposes of blocklisting it in bug 637542), it would be useful to know what version you are using. Please can you go to the page "about:support" (type it without quotes in the address bar) and paste the contents of the extension section as a reply here. Thanks! (Filter bugmail on mcafeeblocklistspam)

the version of McAfee siteAdvisor is 3.3

Adblock Plus1.3.3true{d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}PDF Download3.0.0.2true{37E4D8EA-8BDA-4831-8EA1-89053939A250}DownloadHelper4.8.3true{b9db16a4-6edc-47ec-a1f4-b86292ed211d}Java Quick Starter1.0truejqs@sun.comMicrosoft .NET Framework Assistant0.0.0true{20a82645-c095-46ed-80e3-08825760534b}NoScript2.0.9.8true{73a6fe31-595d-460b-a920-fcc0f8843232}AniWeather0.8.7true{4176DFF4-4698-11DE-BEEB-45DA55D89593}McAfee SiteAdvisor3.3false{B7082FAA-CB62-4872-9106-E42DD88EDE45}ControlSphere Password Manager3.0truepassword.manager@securesystems.lvJava Console6.0.21true{CAFEEFAC-0016-0000-0021-ABCDEFFEDCBA}

Thanks!

Reopening since now in the McAfee section, so something for them to sort out.

Reporter -> Is this still an issue with that latest version of Firefox and McAfee SiteAdvisor?

Went through the issue using the following builds/versions: - latest Nightly build available here: http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/2013-03-11-03-09-46-mozilla-central/ - McAfee SiteAdvisor 3.6.0.187 - Windows XP Pro SP3 x86 Installed the latest version if Nightly & McAfee SiteAdvisor and went through the following tests to ensure the issue has been resolved: - Opened the latest version of Nightly without any issues (no hangs, crashes or performance issues) - Visited google.de several times without any issues - Searched for several terms on google.de without any issues (also selected several search results without any problems) - Used the Google search box (CTRL + K) without any issues - Closed the latest version of Nightly without any issues (no hangs, crashes or performance issues) Hannes, can you reproduce the original issue using the latest version of Nightly & McAfee SiteAdvisor?