[rzzzt]

I encountered this problem in archive.org's DOS emulator, and at that time there was an about:config fix for it: https://support.mozilla.org/en-US/questions/1278533

[jansan]

Those about:config and chrome:flags fixes are only useful for us hackers. You cannot ask your user base to change the deep settings of your browser. For apps it either works out of the box or it does not.