Support for Firefox channels & profiles

[eddy-geek]

I have had to manually add Firefox Dev & Nightly channels, which is fine I guess but they have no icon despite matching the executable in the .desktop file.

It would be nice to improve the mapping done by browser_icon_loader.go, and/or allow custom icons to be specified ?

Examples:

    {
      "name": "Firefox Nightly",
      "command": "$HOME/.local/share/firefox-nightly/firefox --name firefox-nightly -P nightly %u",
      "hidden": false,
      "source": "auto",
      "matches": null
    },
    {
      "name": "Firefox Dev",
      "command": "$HOME/.local/share/firefox-dev/firefox --name firefox-dev %u",
      "hidden": false,
      "source": "auto",
      "matches": null
    }

cat ~/.local/share/applications/firefox-dev.desktop                                               hotfix ✭ ◼
[Desktop Entry]
Name=Firefox Developer
Exec=$HOME/.local/share/firefox-dev/firefox --name firefox-dev %u
Icon=/home/eoubrayrie/.local/share/firefox-dev/browser/chrome/icons/default/default128.png
StartupWMClass=firefox-dev;
...

(Also, profiles have to be added manually with -P like above, but I guess that's an advanced feature so it's ok.)

Anyway, thanks for this nice utility!