This has been a problem on Mac and PCs for prob'ly (at least) 3 yrs. Stalls all applications - and the whole computer. ![]() And manage your bookmarks in Firefox so you don't end up with a cluttered, chaotic collection. ![]() 5 Things To Do When Firefox Runs Slow But Other Browsers Run Fast. But when Firefox is running slow, crashing, or not loading websites properly, it can. By commenting out large sections of the code, I was able to determine that we were calling offsetHeight on some DIVs repeatedly each time an event fired (and it fires a lot).Ĭommon issues with Firefox on Mac and how to fix them. After the initial panic, I set to tracking the precise cause of the performance issues. While performance in IE, Firefox on Windows, and Safari was acceptable (the performance of Safari has been running circles around the other browsers), performance on Firefox on Mac was incredibly poor. ![]() After initially solving a lot of the performance problems by offloading a lot of the calculations to CSS instead of JavaScript (lots of the elements on the page effect the position of all the others), we were cruising along, only to hit a brick wall. ![]() Suffice to say, its a very intensive bit of JavaScript code that stresses the boundaries of all browsers. At thoughtbot, we’re working on an exciting piece of code that will someday be shared with the rest of the world.
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