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Windows 7: How to Fix Annoying YouTube Jumpiness in Firefox

24 Aug 2009   #1

Windows 7 Professional 64-bit
How to Fix Annoying YouTube Jumpiness in Firefox

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Ever notice an annoying, persistent lag every ten seconds or so when you're watching a YouTube (or other) video in Firefox? Reader Bernard Sandberg has, and he's written in with a smart about:config that solves the problem for him.

Although Bernard's talking specifically about YouTube, this tweak should help fix any similar jumpiness in Firefox.
Many users, myself included, visit YouTube on an almost daily basis. Ever since Firefox version 2.0 implemented the session restore function, when you are watching a video on YouTube (perhaps on other video sites as well, I haven't really tested that), you may notice a tiny freeze-up of the video every 10 seconds or so. This happens because the session restore is by default set to save all open tabs every 10 seconds. This is especially noticeable if you happen to have a lot of tabs open at once.

The quick fix for this problem, at least for my own sake, is to increase the time between each of the saves performed by session restore. By opening about:config in your Firefox address bar, then typing browser.sessionstore.interval in the filter box, you'll see a value of 10000, which is in milliseconds. (Meaning your session is saved every 10 seconds.) I changed this to 300000, or every 5 minutes, as I don't have the urgent need for tab restoration. If you feel like being more on the safe side, try increasing it to something a bit lower, say 120000, or every 2 minutes.
We did a bit of research, and it looks like Bernard's not alone with his solution. I've experienced this problem plenty in Firefox, so it's great to see a relatively simple solution, even if it does mean sacrificing a bit in the way of up-to-the-minute session saving. If you give it a try, let's hear if it does the trick for you in the comments (assuming you've experienced this problem in the first place).

My System SpecsSystem Spec

05 Sep 2009   #2

Windows 7 Enterprise

I've never had that problem. Probably depends on the cleanliness of your TCP settings.
My System SpecsSystem Spec

 How to Fix Annoying YouTube Jumpiness in Firefox

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