• tl;dr install ubuntu desktop!!! and dbus and turn off multi-process(not sure this will work long-term!)

Details on how to make Firefox work on WSL

fix fonts, make dbus work

sudo apt-get install dbus-x11
sudo service dbus start
sudo apt-get install ubuntu-desktop

turn off multi-proces

You can disable multi-process windows in Firefox by setting these prefs to false on the about:config page.

   browser.tabs.remote.autostart = false
   browser.tabs.remote.autostart.2 = false 

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