

But "as a precaution," Mozilla said users may consider downgrading to version 15.0.1, and pointed them to the 15.0.1 download page. "At this time we have no indication that this vulnerability is currently being exploited in the wild." "The vulnerability could allow a malicious site to potentially determine which websites users have visited and have access to the URL or URL parameters," Mozilla Director of Security Assurance Michael Coates wrote. The unusual precaution suggests the flaw is a serious one, but there are no reports of it being exploited.

*It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.One day after the release of Firefox 16, Mozilla said it has " temporarily removed" the latest version of its browser because of a security flaw that the company is trying to fix as quickly as possible. *(64 bit Windows) "C:\Program Files (x86)\Mozilla Firefox\"

*(32 bit Windows) "C:\Program Files\Mozilla Firefox\" *Do NOT remove personal data when you uninstall your current Firefox version, because all profile folders will be removed and you lose personal data like bookmarks and passwords from profiles of other Firefox versions. Read this answer in context 👍 1 All Replies (5) Your bookmarks and other personal data are stored in the Firefox profile folder and won't be affected by an uninstall and (re)install, but make sure that "remove personal data" is NOT selected when you uninstall Firefox.
