Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:55.0) Gecko/20100101 Firefox/55.0 BuildID: 20170401030204 After updating to the latest Nightly, uBlock Origin seems to have stopped working. The extension manager still lists it as installed but no ads are blocked and the uBlock icon has disappeared. STR: Try to download uBlock Origin in the lastest Nightly. Expected results: After installation the uBlock icon should show up in the right corner, ads should be blocked. Actual results: Extension does not work Ran mozregression on this and got the following window: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=8df9fabf2587b7020889755acb9e75b664fe13cf&tochange=5bd82c644e1fdc15b92ca9e34b31841151b44957

UBlock Origin 1.11.5rc5 has already fixed the problem.

Ah, I see. https://github.com/gorhill/uBlock/issues/2493 So this will only be a short transition period until the update becomes available through AMO? I think we should leave this bug open until this happens to catch possible duplicates. Thanks for the information Jan

Same issue here, yesterday. :) Cool it has been already fixed. Waiting for the update.