Wó toś tom rozšyrjenju

https://github.com/paradoxfm/firefox_metro_tab

* Add/edit/remove tiles on new page
* Change background
* Lightweight and webextentions
* Change color background
* Choice color from site icon
* Reorder your tiles

Issues: https://bugzilla.mozilla.org/show_bug.cgi?id=1372996

Pógódnośćo swóje dožywjenje