Hi, sorry to hear that. You can check here and copy out your Profile : *https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data You can delete that folder after you have uninstalled Firefox : uninstall Firefox. Then Delete the Mozilla Firefox Folders in C:\Program Files , C:\Program Files(x86) & C:\ProgramData Then restart system. Then run Windows Disk Cleanup. (Note: This should be Pinned and run Weekly, If never done below expect 10's of gig's) Then run it again and click the button that says Cleanup System Files. Reinstall with Current Release Firefox 59.0.3 with a Full Version Installer *https://www.mozilla.org/firefox/all/ In the future please do always : *https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles *https://support.mozilla.org/en-US/kb/export-firefox-bookmarks-to-backup-or-transfer Comodo possibly took something out that Firefox needed. I am sure that this will not mater after a clean install. MOZ_CRASH Reason MOZ_RELEASE_ASSERT(globalObj) Crash Reason EXCEPTION_BREAKPOINT Note fyi : Windows Spring Update out April 30th so back up stuff you want to save to another drive. https://www.windowscentral.com/microsoft-announces-windows-10-april-2018-update If wanting to update pick the Media Creation Tool and Click Update or wait. Update all programs 1st. Please let us know if this solved your issue or if need further assistance.

You can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over the problem. Never work with original files. *https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile *http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox Please let us know if this solved your issue or if need further assistance.

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