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I tried it again on my notebook having seen the Project Quantum dev edition announcement here. Initially impressed by its speed, I've been using it since (3 day

I tried it again on my notebook having seen the Project Quantum dev edition announcement here. Initially impressed by its speed, I've been using it since (3 days I think?). I've found after a few hours it slows down in two very irritating respects -- scrolling gets very janky and reluctant, and switching tabs takes nearly a second. I suppose this may be due to an extension, but given I only use my notebook for work, I don't think I'm going to go through a process of elimination to find which one right now. Back to Chrome for the time being, but I like the current FF incarnation enough to give it another go.

SubiculumCode 9y ago
One suggestion re scrolling. In about:config turn off smooth scrolling. Its for compatability, but most systems work better with it off. The scrolling is much snappier with it off.
- crispinb 9y ago
  Thanks, I'll try that next time if it reoccurs. It's an accumulating problem of some sort, so memory-related presumably. Scrolling is smooth except on the very heaviest pages initially, and gets jankier over time.
asadotzler 9y ago
Can you run the profiler https://perf-html.io/ https://perf-html.io/ and when this happens next, capture a profile of some janky tab switching. Once you've captured a profile you can share it which gives you a link. Then can you file a bug at https:/bugzilla.mozilla.org and include the link to your profile and a description of the symptoms.
- asadotzler 9y ago
  I should have said more about the profiler in case you're new to it. Let it run. It's overhead is really quite low. Then when you notice the slow tab switching or janky scrolling, you hit Capture Profile and that stops the profiler and loads the profile for you to view. IN that view you'll find a "share" button in the top right that makes the profile remotely available and gives you a link you can use to file a bug at https://bugzilla.mozilla.org https://bugzilla.mozilla.org
  - crispinb 9y ago
    I will. I was actually intending to put Firefox aside for a beta release or two, but I've enjoyed using it so much aside from those issues that I think I shall persist for a while. Thanks for the info.

SubiculumCode 9y ago

One suggestion re scrolling. In about:config turn off smooth scrolling. Its for compatability, but most systems work better with it off. The scrolling is much snappier with it off.

crispinb 9y ago
Thanks, I'll try that next time if it reoccurs. It's an accumulating problem of some sort, so memory-related presumably. Scrolling is smooth except on the very heaviest pages initially, and gets jankier over time.

asadotzler 9y ago

Can you run the profiler https://perf-html.io/ https://perf-html.io/ and when this happens next, capture a profile of some janky tab switching. Once you've captured a profile you can share it which gives you a link. Then can you file a bug at https:/bugzilla.mozilla.org and include the link to your profile and a description of the symptoms.

asadotzler 9y ago
I should have said more about the profiler in case you're new to it. Let it run. It's overhead is really quite low. Then when you notice the slow tab switching or janky scrolling, you hit Capture Profile and that stops the profiler and loads the profile for you to view. IN that view you'll find a "share" button in the top right that makes the profile remotely available and gives you a link you can use to file a bug at https://bugzilla.mozilla.org https://bugzilla.mozilla.org
- crispinb 9y ago
  I will. I was actually intending to put Firefox aside for a beta release or two, but I've enjoyed using it so much aside from those issues that I think I shall persist for a while. Thanks for the info.