Cannot scroll/drag pinch-zoomed pages

[fabiolatorre]

Describe the bug
Cannot scroll/drag pinch-zoomed pages

Steps To Reproduce
Steps to reproduce the behavior:

1. Go to any supported webpage
2. Use the pinch-to-zoom gesture with the touchpad to zoom in (not the command++ zoom)
3. Scrolling on the zoomed page doesn't work along any axis. (If the page was originally scrollable, some limited movement happens by scrolling)

Expected behavior
The page should be scrolled/dragged consistently.

Device info:

• operating system: macOS 10.15.7
• Browser and version: Firefox 97
• addon version: 8.7

Additional info
I'm using the middle button. The problem occurs in both Emulate Scrollbar and Grab and Drag setups. Momentum and Axis locking settings do not seem to affect this behavior.

[fastaddons]

Yeah..., this is gonna be very hard :)
I can't find any API that would give me the value of the "pinched" zoom.
Also I'm unable to make a pinch zoom no matter what I try (since I use desktops with no touchpads).
And lastly, this feels like a really rare case, users with touchpad usually scrolls with gestures since those works great. What you are describing is a combination of a hand gesture followed by a mouse interaction? :)

[fabiolatorre]

Not really. I mean, I could, but in my case I have mapped the thumb wheel of my Logitech mouse to the zoom function with Logitech Options. I find it pretty handy to quickly zoom in and out while browsing. Sad that there isn't an API for that. The thing is that scroll bars do appear when I zoom, and that's the reason why I was surprised when it didn't work as I expected it to in the first place. But yeah, I see that this might not be that common.

[voidray]

does this also apply to zooming in using CTRL+Mouse wheel? I use than often for websites where the font is small. When I scroll using the middle mouse button the scroll speed doesn't match the mouse movement if zoom is not 100%.