- Fix some minor issues.
- Add new design in browserAction popup and Settings page.
- Add new features to action menu in browserAction popup and Settings page.
- Add information slideshow to "About" block in Settings page.
- Add light & dark themes.
- Add user interface persistence.
- Update some i18n translations.
- Remove footer from Settings page.
- Code and performance improvements.

- Fix issue with invalid tab id on browser.tabs.onAttached on Firefox Quantum 57-60.
- Fix some icon font issue on Windows 10.
- Fix CSS for private tab list in Settings page.
- Prevent some potential issues in functions.js.
- Code and performance improvements.

- Fix CSP sandbox invalid option.
- Add browserAction title translation for Firefox Android.
- CSS responsive improvements for large screens.
- Icon font improvements for Windows and Linux.
- Code and performance improvements.

- Fix compatibility issue with Chromium PDF Viewer Plugin not working with CSP sandbox.
- Fix compatibility issue with Firefox not opening Google links with CSP sandbox.

- Fix issue with Settings page which could not open again if its tab url was modified.
- Fix issue with browser.tabs.onRemoved event not firing in some case on Firefox Quantum.
- Add internationalization with i18n API.
- Add French, Italian and Spannish translations.
- Add a new option in Settings page that permits to apply Content Security Policy to restrict popups and improve browser safety.
- Modify browser.tabs.create() behaviour from default position to "next to current" for restoring tabs.

Stable release :)
- Add options_ui to manifest.json.
- Add Restore Last button to browserAction popup.
- Add duplicate tab grouping in Settings page.
- Add different color to private tabs in Settings page.
- Modify "About" block in Settings page.

- Fix issue with browser.runtime.port.onDisconnect event not firing for browserAction popup when window is closed.
- Fix issue with tab count badge not updating in some case.
- Fix compatibility issue with browserAction.setBadgeBackgroundColor on Chrome.
- Fix compatibility issue with Tab.favIconUrl not supported on Firefox Android.
- Add blocking web requests for popups to improve browser safety.
- Add current mode to browserAction title for better visibility on Firefox Android.
- Modify the appearance of browserAction popup.
- Code and performance improvements.

- Fix issue with closetab function which could close browser window when new tab popups close automatically on Firefox.
- Add a new option in Settings page that permits to show/hide tab count badge in the browserAction button (no Firefox Android support).
- Add tab count badge in the browserAction button in Normal Mode.
- Add favicons to tab lists in Settings page.
- CSS responsive improvements for mobile display.
- Code and performance improvements.

- Fix issue with Settings page not updating on tab close in some case.
- Fix issue with browser.tabs.onCreated event not firing on previous session restore on Firefox.
- Fix issue with browser.runtime.port.onDisconnect event not firing on unload when window is closed.
- Modify tab list sorting for Settings page.
- Code and performance improvements.

- Modify the appearance of Settings page with two sections Overview and Settings.
- Add "About" block in Settings page.
- Fix issue with Settings page not updating on window close in some case.

- Fix issue with about:blank popups not closing sometimes in Blocking mode.
- Fix compatibility issue with Settings page focus on Firefox Android.
- Code and performance improvements.

- Fix compatibility issue with browser.webNavigation.onCreatedNavigationTarget API on Chrome when popup focus option is set to foreground.
- Fix compatibility issue with browserAction popup on Firefox Android when Settings tab is created.
- Code and performance improvements.

- Add a new option in Settings page that permits to control popup focus on opening.
- PopupFilter icon and badge improvements.
- Code and performance improvements.

- PopupFilter icon improvements such as dynamic change on browserAction popup and settings page.
- Fix compatibility issue with browser.windows API on Firefox Android.
- Fix compatibility issue with browser.browserAction API on Firefox Android.

- Add new icons according to PopupFilter modes and add badge on toolbar.
- Fix issue with Firefox about:config when browser.tabs.closeWindowWithLastTab is set to false.
- Code and performance improvements.

First version :)
Note: As Firefox Android APIs are currently under development by Mozilla, the full support for Android version will come in future updates.