While the application code itself is C++/JS, instrumentation code is Python. Sure could use a hand with getting instrumented testing up for existing suites. Automated testing for network leaks etc would also be neat.
(I guess manual testing is not in scope for what you are looking for here but that is of course also welcome)
Feel free to open an issue on tracker if you think it might be relevant and want to discuss ideas, or you can "DM" here!
https://codeberg.org/konform-browser/
EDIT to add: If not (aw), how about QubesOS?
https://github.com/QubesOS/qubes-issues/issues?q=state%3Aopen+label%3A"C%3A%20tests"
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