Here is my status report for September 2022.
This month I have worked on refactoring tor-launcher and moving it to the main Tor Browser patchset .
It took me a long time, but I am sure it will help the Arti transition, too.
Apart from that, I added a patch to mitigate a font fingerprinting vector  and managed to get another patch upstreamed to Firefox .
Finally, last week I started to unify the GeckoView patch set that we use for Android with the patch set we use for the desktop version of Tor Browser .
 Bug 40933: Move tor-launcher to tor-browser.git (!348) · Merge requests · The Tor Project / Applications / Tor Browser · GitLab
 Review Mozilla 1226042: add support for the new 'system-ui' generic font family (#41116) · Issues · The Tor Project / Applications / Tor Browser · GitLab
 1768907 - nsTransferable disk-leaks when private browsing mode is enabled by default
 Use the same branch for Desktop and GeckoView (#41308) · Issues · The Tor Project / Applications / Tor Browser · GitLab
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