Make test suite robust with Tor Browser 9.0
Originally created by @intrigeri on #17056 (Redmine)
I see lots of failures which seem to be clear test suite robustness
regressions triggered by the upgrade to Tor Browser 9.
This makes it hard to tell what else we need to do on #16356 (closed), and
whether TB 9 fixes #17007.
Parent Task: #16356 (closed)
Related issues
- Related to #17121 (closed)