1. Go to a long page, such as http://mindprod.com/unmain.html 2. Click-and-hold on the scrollbar about half-way down. 3. Page starts scrolling. 4. While still holding down the mouse button, move down to near the bottom of the scrollbar area. 5. Wait Expected Results: Scrolling continues to the new mouse position Actual Results: Scrolling stops at the original mouse position Build: 2001030804 This is near-dogfood for me.

->evaughan/p4. What you expect is correct behavior on Win/Mac; Linux scrollbars just keep scrolling as long as the mouse is down (regardless of where), but I think that is just wrong.

I took a look at this, and the main stumbling block I ran into is that nsSliderFrame::HandleRelease gets called in NS_MOUSE_EXIT_SYNTH processing as soon as the thumb passes under the pointer. If I could figure out how to tell if the mouse button is pressed or not, I could get through this. Happen to know if there's such a function?

Filed bug 78248 to expose an API to determine if a mouse button is pressed.

*** Bug 31490 has been marked as a duplicate of this bug. ***

Sweet, caillon fixed this! Care to verify the dupe? *** This bug has been marked as a duplicate of 153946 ***

Doh. I really did look for duplicates but couldn't find this bug. Verified.