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Honestly, I blame developers who, some years ago, decided it was a good idea to centralize the browsers into the same engine. Yeah, it was hellish to maintain code for all browsers at the time (IE5, IE6, Firefox, Safari, etc), but it was paradise compared to our current scenario: at least we really had options: WebKit, Trident, Gecko, as well as lots of smaller, almost unknown engines. Now, all modern browsers are different wrappings of Chromium or Firefox, while most modern sites are developed without the active worry to keep Firefox compatible (one can notice how modern HTML5 features varies across both of them). It has no easy solution. Don't update, maybe? (Until sites start to complain about the outdated version)