Adapt Tor Browser toolchains for Firefox 68 ESR

This is the parent ticket for all toolchain related changes we need to make to build Tor Browser based on Firefox 68 ESR.

Trac:
Child Ticket(s): #27493 (moved), #30376 (moved), #30701 (moved), #30734 (moved), #30321 (moved), #30322 (moved), #30323 (moved), #30324 (moved), #30490 (moved)

added GeorgKoppen201908 TorBrowserTeam201910 component::applications/tor browser ff68-esr owner::tbb-team priority::medium resolution::fixed severity::normal sponsor::44-can status::closed tbb-9.0-must-alpha tbb-rbm type::task labels

Trac:
Keywords: N/A deleted, GeorgKoppen201905, TorBrowserTeam201905 added

Not sure if this belongs here, but I could build current rebased Tor Browser branch (https://github.com/acatarineu/tor-browser/tree/30429+1) with tor-browser-build linux_esr68_v6 gk branch and some minor changes: https://github.com/acatarineu/tor-browser-build/commit/linux_esr68_v6_tmp. Note that the tor-launcher has some UI problems (I guess it's expected), but it was able to bootstrap Tor and proceed to launch the browser.

For the searchplugins lines I commented, the path does not seem to be there anymore. Are these needed for localized builds? Besides, I could not do localized builds (non testbuild builds), my understanding is that we are not ready for that yet, but please correct me if I'm wrong.

Moving tickets to June

Trac:
Keywords: TorBrowserTeam201905 deleted, TorBrowserTeam201906 added

Moving my tickets to June

Trac:
Keywords: GeorgKoppen201905 deleted, GeorgKoppen201906 added

Moving my tickets to July.

Trac:
Keywords: GeorgKoppen201906 deleted, GeorgKoppen201907 added

Moving tickets to July

Trac:
Keywords: TorBrowserTeam201906 deleted, TorBrowserTeam201907 added

Starting with 9.0 keywords

Trac:
Keywords: N/A deleted, tbb-9.0-must-nightly added

Adding Sponsor 44 to ESR68 tickets

Trac:
Sponsor: N/A to Sponsor44-can

Moving tickets to August, part 1

Trac:
Keywords: TorBrowserTeam201907 deleted, TorBrowserTeam201908 added

Move my tickets.

Trac:
Keywords: GeorgKoppen201907 deleted, GeorgKoppen201908 added

Move must-nightly items to must-alpha ones.

Trac:
Keywords: tbb-9.0-must-nightly deleted, tbb-9.0-must-alpha added

Moving must-alpha tickets to September.

Trac:
Keywords: TorBrowserTeam201908 deleted, TorBrowserTeam201909 added

Trac:
Keywords: N/A deleted, TorBrowserTeam201910 added

Trac:
Keywords: TorBrowserTeam201909 deleted, N/A added

Done.

Trac:
Status: new to closed
Resolution: N/A to fixed

Re-opening for Trac stupidness.

Trac:
Resolution: fixed to N/A
Status: closed to reopened

Trac:
Resolution: N/A to fixed
Status: reopened to closed

closed

mentioned in issue #30492 (moved)

mentioned in issue #31845 (moved)

mentioned in issue #30323 (moved)

mentioned in issue #30321 (moved)

mentioned in issue #30322 (moved)

mentioned in issue #30324 (moved)

mentioned in issue #30376 (moved)

mentioned in issue #30490 (moved)

mentioned in issue #30701 (moved)

mentioned in issue #30734 (moved)

moved to tpo/applications/tor-browser#30320 (closed)