Backport Bugzilla 1958738: Google Maps is retaining data between sessions

⬅️ Backport Patchset

Bookkeeping

Issue(s)

• tor-browser#12345
• mullvad-browser#123 (closed)
• https://bugzilla.mozilla.org/show_bug.cgi?id=1958738

Merge Request(s)

• !123 (merged)

Target Channels

• Alpha
• Stable
• Legacy

Notes

@thorin found that bug.

It's a potential disk leak, regression in 136.

Upstream isn't going to uplift to ESR, since it's an Android thing.

It might be worth checking if the patch is easy to backport.

/cc @clairehurst @dan

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