Bug 41577: Disable profile migration

Merge Info

Related Issues

• #41577 (closed)
• tor-browser-build#40732 (closed)

Backport Timeline

• Immediate - patchsets for critical bug fixes or other major blocker (e.g. fixes for a 0-day exploit) OR patchsets with trivial changes which do not need testing (e.g. fixes for typos or fixes easily verified in a local developer build)
• Next Minor Stable Release - patchset that needs to be verified in nightly before backport
• Eventually - patchset that needs to be verified in alpha before backport
• No Backport - patchset for the next major stable

Upstream Merging

• Merge to base-browser - typically for !fixups to patches in the base-browser branch, though sometimes new patches as well
  • NOTE: I should probably create a separate MR, because the changed file contains Tor Browser's stuff.

Issue Tracking

• Link resolved issues with appropriate Release Prep issue for changelog generation

Change Description

We disable the profile migration on macOS with an override.ini.

We could disable directly in the browser with MOZ_PROFILE_MIGRATOR=0.

I believe we do that only on macOS because we ship a default profile in other platforms, but if everything goes as I expect, we won't anymore on base browser.