Reproducible: always Steps To Reproduce: 1. Launch Firefox56.0b3 2. Install uBlock Origin https://addons.mozilla.org/en-US/firefox/addon/ublock-origin/versions/beta 3. Right click on the uBo toolbar button and choose Move to Menu 4. Quit browser 5. Launch Nightly57.0a1 with the same profile of the above 6. Open Hamburger menu Actual Results: No uBo related item is found Expected Results: ubo related item should be appear somewhere. And Provide a help.
I think this is not uBo specific problem.
I don't think it makes sense to track this separately from bug 1391311.