moreFromMozilla pane in about:preferences in 12.0a2
### Summary
There is a pane "More from Tor Project" (about:preferences#moreFromMozilla) with potentially confusing links.
### Steps to reproduce:
1. Hamburger menu
2. Settings
3. More from Tor Project in the sidebar
### What is the current bug behavior?
It displays a pane "More from Tor Browser" with sections:
* Tor Browser Mobile
* Mozilla VPN
* Mozilla Rally
These look like Mozilla-specific products that can be confusing or misleading in the Tor Browser context. The "Tor Browser Mobile" link goes to https://www.mozilla.org/firefox/mobile/get-app/. The "Mozilla VPN" section could exacerbate confusion about whether to use a VPN with Tor. I don't know what Mozilla Rally might be.
<img src="/uploads/0c586734e9608ef98b1f592ea8e8072c/torbrowser-12.0a2-moreFromMozilla.png" width="50%" alt="Screenshot of about:preferences#moreFromMozilla in Tor Browser 12.0a2">
### What is the expected behavior?
I suppose this option should be removed from the sidebar. I was able to make this happen locally by setting the pref `browser.preferences.moreFromMozilla=false`.
## Related links
* [1737712 - [meta] More from Mozilla](https://bugzilla.mozilla.org/show_bug.cgi?id=1737712)
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