Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Vertical scrolling with trackpad stops working in a browser window

  • 1 reply
  • 1 has this problem
  • 7 views
  • Last reply by Dale

Dale
Dale
more options

Vertical scrolling using two fingers on my MacBook Pro's trackpad randomly stops working on all tabs in a given Firefox window. The same gesture in other windows of the same Firefox process keep working. Arrow key scrolling works, as down page up/down. Grabbing the scroll bar and dragging does NOT work, but clicking on the scroll bar will scroll.

After two minutes or so, scrolling will suddenly start working, and the page I'm on will suddenly jump, as if the scroll events had been buffered up.

I cannot figure out how to reproduce this. I'm running Firefox in a terminal, but I'm not seeing anything interesting on stdout/stderr.

How can I fix this, or at least diagnose it? Thank you for your help!

Vertical scrolling using two fingers on my MacBook Pro's trackpad randomly stops working on all tabs in a given Firefox window. The same gesture in other windows of the same Firefox process keep working. Arrow key scrolling works, as down page up/down. Grabbing the scroll bar and dragging does NOT work, but clicking on the scroll bar will scroll. After two minutes or so, scrolling will suddenly start working, and the page I'm on will suddenly jump, as if the scroll events had been buffered up. I cannot figure out how to reproduce this. I'm running Firefox in a terminal, but I'm not seeing anything interesting on stdout/stderr. How can I fix this, or at least diagnose it? Thank you for your help!

All Replies (1)

Dale
Dale Question owner
more options

I can actually reproduce this now by just opening some Firefox Bugzilla pages.

1. Open https://bugzilla.mozilla.org/show_bug.cgi?id=781484 in a tab 2. Make a new tab and open https://bugzilla.mozilla.org/show_bug.cgi?id=781484 again in the new tab 3. Switch to the old tab using a gesture I have defined in BetterTouchTool

Scrolling is now broken in both tabs.

Not sure if BTT is the chief culprit here. I have the same gesture defined for Chrome and it works fine on the same computer. Also, I could not reproduce this with a fresh profile. I've now done a "refresh" in Firefox, and after reconfiguring all my add-ons and some other settings (*grumble*) I'm not able to reproduce this right now. Going to wait and see if this comes back.

Also, I never had this problem on my 10.14 machine, where I'm syncing with Firefox, and which also has the same BTT settings.

Modified by Dale