Release 5.0.0_rc1 This is an RC release as we have massive changes that made the new about:mobile page possible, and because we have known issues (listed further below). We plan to make the final release in roughly a week. Features: * A new "about:mobile" page has been added that allows changing options, such as having the address bar on top or bottom, showing a close button on each tab, etc. * Improved popup handling based on the work by FuriLabs for the FLX1 * Improved webextension usability allowing wide extensions like uBlock origin to be vertically scrolled * Fixed extension install popup * Improved App Menu: Quit, Save Page, Print buttons are back, the "More" and "Report Broken Site" buttons are hidden by default now and an option has been added to show the full App Menu in about:mobile. Other: * Code has been made more modular. * userChrome: Remove deprecated -moz-bool-pref media queries * tabmenu.css: Remove code for older-than ESR 140 * urlbar.css: Remove code for older-than ESR 140 * Files are now in /usr/lib * Remove misspelled dom.w3c.touch_events.enabled preference * UserAgentManager: Update Chrome UA * Makefile: add a dummy target Known issues: * Preferences in the about:mobile page are not synced yet, so the state of the sliders can get out-of-sync with the actual preferences. When you toggle them, they still have an effect, but may not always display the correct state of the option. * The tab-bar has a cosmetic issue in non-ESR FF: the full tab width is not used, instead there is a small place where the next tab is shown. * Tap outside of the menu to close it: doesn't always work. Thanks to Danny and Peter for making these changes upstream! Also to Jesús Higueras who implemented the improved popup support in furios-firefox-tweaks first, on which the related changes here are based.