Created attachment 8787213 [details] Archive.zip [Note] This is a follow-up bug for Bug 1285493 [Affected versions]: Firefox 50.0a2 (2016-09-01) Firefox 51.0a1 (2016-08-31) [Affected platforms]: Windows 10 64-bit Ubuntu 16.04 32-bit [Steps to reproduce]: 1.Launch Firefox with clean profile. 2.Navigate to about:debugging and install the attached webextension 3.Go to about:addons and open the add-on details page. 4.Enable and disable the add-on a few times. [Expected results]: The “Disable/Enable” and “Remove” buttons remain in the same position while disabling/enabling the webextension. [Actual results]: the “Enable/Disable” and “Remove” buttons change their position when the webextension is enabled and disabled back: http://screencast.com/t/c7ga5q2uF6x
This add-on specifies an options_ui which in this case is blank. The movement up and down of the buttons is caused by the options.html in the addon being inserted and then removed as the state changes. For most add-ons if they specify and options_ui, I'd expect that to specify and options.html as well and the UIs behaviour would make sense. Closing as won't fix based on that and the expectation that one day, we'll rewrite this UI.
(In reply to Andy McKay [:andym] from comment #1) > Closing as won't fix based on that and the expectation that one day, we'll > rewrite this UI. For which, see bug 1212685.