User Agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:51.0) Gecko/20100101 Firefox/51.0
Build ID: 20170118123726
Steps to reproduce:
step 1: Launch Firefox
step 2: Responsive Design Mode is enabled.
step 3:Navigate to a non-remote page. (Eg. about:support)
The non-remote page is opened with RDM enabled.
The page is correctly loaded and the RDM tool is disabled.
Cannot reproduce this issue with the newest version of Nightly with the following specs:
Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:54.0) Gecko/20100101 Firefox/54.0
Can you see into trying to reproduce this issue in the newest version of Firefox Nightly?
The appears to work correctly in the new RDM design, first enabled in 52. It will reach release in ~6 more weeks.
Please reopen if you see this behavior is 52 or later.