Hi druidamortis, Glad to hear from your edit that Firefox works again. You may wish to try to see if the Firefox profile may be recovered from your Recycle bin or by using Windows previous versions. It will probably contain important settings and information such as logins & bookmarks. * https://support.microsoft.com/en-us/help/17119/windows-7-recover-lost-deleted-files *How to Restore Files and Folders in Windows 7 with Previous Versions http://www.sevenforums.com/tutorials/85679-previous-versions-restore-files-folders.html if you feel the need to remove Firefox profiles again I strongly suggest # That you back them up first #* [[Back up and restore information in Firefox profiles]] #* [[Recovering important data from an old profile]] # That it may be less drastic but useful if instead you tried the Firefox Refresh option. (Bookmark any addon's home or support site first). #* [[Refresh Firefox - reset add-ons and settings]] '''Note your crash may have been because of ESET security software.''' Please keep that fully updated, and if you get crashes consider temporarily disabling or installing the ESET software. Note Windows 7 has security software built in. Firefox will shortly need to update to version 48. You could then again get crashes until the eset software catches up and updates. ----- Forum note * Crash report bp-2dbf61c3-c799-406d-8e7b-4bc0f2160723 * Related Bug 1229252 - startup crashes in nss3.dll@0x1e5b60 | GetFileInfo, due to software from ESET (eOppMonitor.dll)