Dear Maintainer,

Since this morning, Firefox seems to crash when I visit a tab with a Youtube
applet in it (or a similar applet, not from Youtube).
It does not crash when I open the tab (middle-click), only when I open it (try
to read the page). The crash happens only when the page is fully loaded and
visited.
I have no crash to submit about this in about:crashes even if it crashed half a
dozen times this morning.

Maybe it’s related to #888423 because Firefox was already very unstable before
today.

Yours,