In some cases relying on Firefox as your main browser can turn out to be a sadomasochistic endeavor. Sadly though 100% of the web is written with Chrom(e/ium) in mind. Firefox lost the ball on this too long ago for it to come back on this. I can't help but see Firefox as a headless running chicken sometimes. And doesn't help matters that Mozilla doesn't care enough to at least try and take back some of it's former glory.