With Page to Popup you can easily see your desired website (mobile view) in the Firefox toolbar Panel.
Some Important Features:
1. Open any desired website (should support mobile view) in Firefox toolbar panel.
2. Available in 5 different mobile views (iOS, Android, Windows Phone, Tizen and Firefox OS)
3. Highly Customizable: change panel size (width & height) to your desired size.
4. Has the option to block Ads within the panel.
Note: in order to report Bugs, please fill the bug report form at the addon Homepage.