Forum Discussion
Dev channel update to 82.0.446.0 is live
DavidGB we're actively working on both open tabs and history syncing, which is why they both have grayed out switches with "Coming soon!" in the sync settings page. No timeline we can announce right now though.
For the scroll wobbling, I know for a fact this is something we're tracking since I opened the bug for it 
This is something that some hardware experiences more than others, so if you and anybody else who experiences it feel comfortable sharing what devices you have, it could help us. For example, I see it a lot on my Surface Laptop's trackpad.
For the website darkening, we're hoping to bring support for the full flags page to mobile, so in theory, if you can get to it via flags in mobile Chrome, you should eventually be able to do so in mobile Edge, assuming we also bring that particular flag over.
I've found the source of the wobble and how to turn it off!
The side-to-side wobble on fast scrolling, along with the way it will overshoot the top and bottom of the page then bounce back to the actual top and bottom, is all part of something called the 'Microsoft Edge scrolling personality' which I found in edge://flags. I disabled it, re-started, and now Edge scrolling is rock solid - no side-to-side wobble and no more overshoot of top and bottom. (So vague rubbery scrolling is a 'personality'?)
So that's where the problem is. Leaves the question of whether turning it off loses anything. Horizontal overscroll still steps forwards and backwards through the tab's history (which is a feature I hadn't noticed until looking at this).
Frankly the 'personality' scrolling wobble and overshoot-and-bounce is disconcerting enough that unless turning it off loses something significant I suggest having the option in settings rather than make users have to dig into the flags page. And I would have it DISABLED in the stable channel: as I said before, in its current state it makes Edge feel like some cheap shoddily made machine.
DavidGB ah yes, this must be related to our work to bring scrolling back to where it was in Edge Legacy. Obviously, we still have some work to do! That's why it's behind a flag still.
Yes the scrolling 'personality' is behind a flag, but the default is currently enabled, as it was set at default, I'd certainly never changed it (or even noticed it before) and explicitly disabling it cured the wobbly, rubbery scrolling. I'm suggesting the default should be disabled for the Stable channel at least, and for us mooks on Dev and Canary it would be better in settings where we can see it, realise it's a thing, and can easily turn it off when we find it too disconcerting. I mean up until i found that flag and disabled it, I just thought the scrolling was generally messed up; I really had no reason to suppose it was being caused by an experiment that needs a lot more work.
As I never used Edge Legacy, what exactly is this scrolling 'personality' supposed to do beyond normal, crisp, responsive and not-wobbling-all-over-the-place scrolling as in Firefox, Chrome, and Edge with the 'personality' turned off? If I had some idea what you're trying to do and what benefit it's supposed to provide I'd be more inclined to go through the performance of digging down to the flag and re-enabling it from time to time to test it.
it would be better in settings where we can see it, realise it's a thing, and can easily turn it off when we find it too disconcerting
DavidGB in this case, there's no setting because there was never intended to be an option of whether to use Edge's scrolling behavior or Chromium's. Bugs notwithstanding, we believe Edge Legacy's behavior was superior, so it's just intended to replace Chromium's default behavior.
what exactly is this scrolling 'personality' supposed to do
The major parts of it are that it behaves like most other touchscreen devices do when scrolling with your finger: you can pull past the page area, it bounces back if you scroll and let go and let it hit the end of the page, etc.