[jamietanna]

There was also a recent rollout of React, of which I've seen a number of complaints about performance related to the timing.

Personally, my Firefox Nightly on Android will regularly crash (along with the whole System UI) when opening / trying to type into a GitHub page

[jvans]

the treadmill of perpetual tech migrations only to find out about the downsides after months of work

[niij]

Same experience here on Firefox stable on Android. The file editing portion of Github is unusable for files more than a few hundred lines.