Can’t wait Firefox Quantum on Endless OS?

https://gitlab.com/cho2/blog-images/raw/master/2017-11-15/1.png

  • On tab Permissions, checklist on Execute box

https://gitlab.com/cho2/blog-images/raw/master/2017-11-15/2.png

  • Right click on .AppImage file then choose Run
  • If there is a dialog window like this, press Yes button

https://gitlab.com/cho2/blog-images/raw/master/2017-11-15/3.png

  • Firefox Quantum ready

https://gitlab.com/cho2/blog-images/raw/master/2017-11-15/4.png

PS: This is not an official AppImage from Mozilla - if you want it, be sure to comment on https://bugzilla.mozilla.org/show_bug.cgi?id=1249971

Reference: