A bit off topic from the post at hand, but my gripe was the opposite. The relentless pursuit of parity made them indistinguishable giving users no reason to switch (and taking dev time away from distinguishing features). Granted the pursuit of users instead of principles is its own folly that's hard to overcome when money is needed.
* blank pages when trying to load an imgur gallery on v68 (esr).
* image uploading not working right on instagram and various other sites, either producing blank images or ones with weird lines.
* several teleconferencing / video meeting websites just don't work properly, whether it's not detecting hardware properly, etc
I have to keep chromium installed so I can use these sites properly.
https://bugzilla.mozilla.org/enter_bug.cgi?product=Web%20Com... if you're on desktop.
Like PDF support?