Test that about:tor page is properly loaded

During the last beta release we realized that some translators translate "about:tor" which breaks it. We should write a test that checks this crucial page is working in built bundles.

added component::applications/quality assurance and testing in Legacy / Trac owner::tbb-team in Legacy / Trac parent::33654 in Legacy / Trac priority::medium in Legacy / Trac severity::normal in Legacy / Trac sponsor::58 in Legacy / Trac status::assigned in Legacy / Trac type::enhancement in Legacy / Trac labels

Trac:
Status: new to accepted

Set all open tickets without a severity to "Normal"

Trac:
Severity: N/A to Normal

Adding S58 on testsuite tickets.

Trac:
Sponsor: N/A to Sponsor58

Trac:
Reviewer: N/A to N/A
Parent: N/A to legacy/trac#33654 (moved)

Release all this tickets back into tbb-team.

Trac:
Status: accepted to assigned
Owner: boklm to tbb-team

mentioned in issue legacy/trac#33654 (moved)

moved from legacy/trac#11508 (moved)

added Feature label and removed 1 deleted label

removed 1 deleted label

added Roadmap::Future label