Moving Off of ESR Channel
I have a Mac system that has been on OS X 10.11.6 for a long time, and was switched to the ESR channel when the release channel no longer supported this version. I have finally been able to update that system to something later (Mojave, 10.14.6) and want to restore Firefox to the release channel. How do I do this and preserve all of the Firefox settings, history, etc.? Won't installing a fresh copy of Firefox wipe all that out? Thanks for any help you can provide.
Solution choisie
Uninstalling the Firefox 78 ESR release (i.e. drag the application to the Trash) doesn't affect the Firefox profile folder that is located elsewhere. I don't know whether the current Firefox 84 release will want to use this profile or will create a new default-release profile, but you can delete compatibility.ini in your current ESR profile to allow Firefox to use this profile.
Location used for the main profile that keeps your personal data (Root Directory on about:profiles).
- ~/Library/Application Support/Firefox/Profiles/<profile>
- https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data
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Solution choisie
Uninstalling the Firefox 78 ESR release (i.e. drag the application to the Trash) doesn't affect the Firefox profile folder that is located elsewhere. I don't know whether the current Firefox 84 release will want to use this profile or will create a new default-release profile, but you can delete compatibility.ini in your current ESR profile to allow Firefox to use this profile.
Location used for the main profile that keeps your personal data (Root Directory on about:profiles).
- ~/Library/Application Support/Firefox/Profiles/<profile>
- https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data