Internet Explorer - Its bugs, rendering, lack of support for new tech. Many of our customers lock their users down to IE11. This prevents us from using flexbox (buggy), CSS grids (missing), Service Workers (no support), etc. IE 11, which is still the default internal browser for my organization. So it must be fully supported, meaning if we can't make something work at near 100% parity in IE, we can't do it.
Support for old browser (IE 11 most of the time)
IE11. I bet 99% of people say that.
Firefox In browsers/platforms causing issues , 12% and 7% chose Firefox on desktop and mobile respectively, with up to 3 choices per survey respondent.
Web developer quotes A sample of the 46 free-form survey responses relating to Firefox:
Sometimes I have problems with Firefox
Firefox and Safari lagging behind Chrome.
Sometimes Web API works in Chrome but not in Firefox or Safari. […] E.g, Web Share API works in Chrome and Safari but not in Firefox, Preload works in Chrome and Safari but not in Firefox. The completely different handling of :focus by Firefox. Where (almost) every browsers gives focus to an anchor, for Firefox you have to use :target.
Blur filter (css) in firefox has performance issues.
Safari In browsers/platforms causing issues , 50% and 46% chose Safari on desktop and mobile respectively, with up to 3 choices per survey respondent.
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