User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:22.0) Gecko/20130225 Firefox/22.0 Build ID: 20130225031141 Steps to reproduce: i have a saved webpage with 1792 images , total size 80MB. With HWA on : Page takes about 2.4GB of RAM. Fast Scrolling _once_ from top to botton to top is smooth. But fast scrolling after that getsjanky. Task Manager shows Nightly using ~2.5GB RAM. Using a GPU monitoring utility, i see that the GPU VRAM gets filled up. My GPU is a HD5470M (Dx11, 512MB VRAM) . As soon as the VRAM usage get ~500MB, the Nightly crashes. Craash dump : https://crash-stats.mozilla.com/report/index/bp-0c001947-3014-4b27-9a34-1077c2130226 With HWA off : Nightly takes ~3GB RAM. Smooth no matter how much or how fast you scroll up and down.

Looks like an OOM crash to me, not much firefox can do about the crash in it self. The memory usage might be worth looking into though.

Your Troubleshooting Information page says HW acceleration is disabled. Does it happen in Safe Mode because many extensions doesn't help in memory usage (see https://support.mozilla.org/kb/troubleshoot-firefox-issues-using-safe-mode)? It's likely a duplicate of bug 829954.

Yes, Nightly is crashing with a new profile. Just wanted to be clear that crash is only when HWA is ON. Also, when GPU memory is high, heavy paging starts occuring. (But i use a SSD so doesnt make much of a difference) With HWA off, RAM use is 3GB, but there is no (or very little) paging. And no crashes occur.

Please provide a URL or a testcase to reproduce.

http://funnymama.com/search?q=funny+korean+comics Now scroll down. And down.And down.And down.And down.And down.And down.And down.And down.And down.And down.And down. After quite some time, you will find no more images will load. Now save the complete webpage. Its size should be around 80MB. Now close Nightly and open the saved webpage from disc.

I've got an empty crash signature: bp-ca9ca466-42a4-455f-939f-1d3a62130226.

I also get a empty crash signature on a fresh profile. And usualyy it happens while the page is loading. I tried 4-5 times in a fresh profile, and each time i got the empty crash. In my normal profile, i always get the signature linked in comment 0 .

I can't reproduce it in today's nightly that contains the fix of bug 689623. Are you able to reproduce it?

my latest nightly is : http://hg.mozilla.org/mozilla-central/rev/73f0c5b00572 does this have the fixes of bug 686923 ?

no, but it contains the fix for bug 689623 ;) Joke aside, yes that one has the fixes.

yes it has magically fixed the issue. Memory usage is arounf 500-600MB (down from 2.4GB+ ) . But this has caused LARGE janks in quick vertical scrolling (behaviour also showed by Chrome). So this bug is fixed.

Scoobidiver : Can you please check if you noticed any change in STR of comment 5 after bug 689623 has landed ? Specially, after opening the saved webpage from the disc, scroll try to do fast scrolls.