See bug 1068163 comment 4.

Bill, I'm pretty swamped. Who would be a good person to own this?

I'll let this sit here for a while while we see how compartment_per_addon goes. Once that feels solid we can land this. I wish there was a way to needinfo my future self, but I guess I'll just leave the flag set.

Stylish 1.4.3 [1] does this fairly consistently for me with E10s, usually when restarting after re-enabling the add-on. That's a fresh profile with just Stylish and E10s enabled. Weirdly, the most consistent crash I can cause is clicking the button to read user reviews in the Add-on Manager. It only happens when Stylish is enabled, but crashes when attempting to read reviews of any add-on. [1] https://addons.mozilla.org/en-US/firefox/addon/stylish/ Respective crash reports: https://crash-stats.mozilla.com/report/index/df93476e-c5f9-44b9-9525-1cf922140916 (Enabling) https://crash-stats.mozilla.com/report/index/da557f00-ada5-44af-a77b-817e92140916 (Reviews)