The "no second request" checks waited a fixed 150 ms or 1000 ms and the
hover probe 450 ms, which can pass vacuously on a slow Firefox or WebKit
run. They now read the fetches the page's code started (the API client
calls fetch in the same task as the press), wait for a timer of the
toolbar's own debounce delay set after the debounced report, and wait
for the hover transition to finish.
Checked by mutation: without the favorite pending guard or the toolbar
equality guard, the rewritten checks fail.
Vito Sansevero
2400eed712