For the past few days, I have been getting very regular crash notices. This happens with several different mockups loaded, and even on the main projects screen of the site. It has happened when I’m actively working and also when the page was sitting idle.
It seems to happen only in Firefox, which I usually use for mockup work. I also use Brave, and I haven’t seen it there.
A screenshot is attached below.
Hi @Roger_Bonine, and sorry for the trouble.
We have noticed this issue, and we’re investigating it at the moment so that we can fix it for everyone. I’ll post an update here once we’re done, but in the meantime, using another browser is the best solution, indeed. I can confirm that the issue only affects Mozilla Firefox.
Thanks for taking the time to report it!
I’m sure you already know this, but the Firefox issue appears to be fixed. No crashes in the last several days. 
Update: The Firefox issues appear to be back, and are now worse than they were before. I’m seeing continual crashes when leaving screens idle for a few minutes (which I saw before) and also when navigating between wireframes (which seems to be new). As before, the app seems to be fine in Chrome-based browsers.
Sorry for the continuing hassle with this one, @Roger_Bonine.
We’re working on fixing this one permanently as we speak, and we plan to release the fix early next week. Thanks again for your report!
