User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:53.0) Gecko/20100101 Firefox/53.0 Build ID: 20161208030206 Firefox for Android Steps to reproduce: 1. Access a non-responsive page such as github.com Actual results: Firefox always shows the page in 1:1 zoom ratio with scrollbars Expected results: Firefox should zoom out to match the page to the browser window size if Windows is in tablet mode.

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:53.0) Gecko/20100101 Firefox/53.0 I have tested this issue on Windows 10 x64 with the latest Firefox release (50.0) and the latest Nightly (53.0a1-20161212030206) and could not to reproduce it. After navigating on github.com and resizing the window, when enabling "tabled mode" in Windows, the browser window and the page is resized to fit the screen. Can you please retest this using a new clean Firefox profile, maybe even safe mode, to eliminate custom settings as a possible cause (https://goo.gl/PNe90E). Also if possible, do you think you could provide us with a screen recording of the issue, in order to better understand it and try to reproduce it on our end? You can sue this tool if you like: https://screencast-o-matic.com/screen_recorder

I'm sorry but can you retry with github.com/servo/servo? I forgot the github main page *is* responsive. This screenshot shows Firefox behavior: https://1drv.ms/i/s!ArDhQNmhsUj02qdGwyRrqY2masszbw And this screenshot shows Edge behavior (It zooms out): https://1drv.ms/i/s!ArDhQNmhsUj02qdHaNGkv7_jp_pYEg

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:50.0) Gecko/20100101 Firefox/50.0 I have tested this issue on Windows 10 x64 with the latest Firefox release (50.1.0) and the latest Nightly (53.0a1-20161226030205) and managed to reproduce it. After loading the provided URL in comment 2, when enabling "tabled mode" in Windows, the webpage keeps its 1:1 zoom ratio with scrollbars.

In order to implement this we need to properly support continuous/pinch-zoom on desktop platforms.