I'm also having the same problem, but it is happening with my trackpad. Vertical tabs are fine, but Horizontal tabs are stuck. I have turned off all my extensions and even reinstalled Orion, but still have the issue. My first Orion version was 2 updates ago, I wish I could go back to it, since I had no problems with it. Only after updates did problems start showing up.
Version 0.99.121.1-beta (WebKit 614.1.20)
MacBook Pro (macOS Monterey 12.6.1 build 21G217)
You can disable "Always show titles in tabs" option in the Settings to get around this, in a way.
What confuses me is that I am able to scroll without a problem both on apple mouse and track pad.
Any ideas where to look?
I have no idea, it only started being a problem after the update. Is there some debug info we can send you to help?
Just wild guessing: MemeScreen and I both use precisely the same macOS version (Monterey 12.6.1). Have you, as a developer already updated to Ventura? Maybe the bug doesn't appear there and only happens to Monterey users or users of this specific Monterey version?
Vlad I doubt it, but could it be an Apple Silicon problem? Also is there a debug mode or build we can use to help narrow down the problem?
pancake-of-doom Nope, this doesn't work for me on Ventura either. I've used a Microsoft bluetooth mouse, as well as the MX Master 3S. Neither triggers a tab bar scroll on vertical scrolling, without using the shift key.
Same problem on MacOS BigSur (11.6.3) on a MacBook Pro (intel, early 2015). I can't scroll through tabs, it doesn't work even with pressing the shift key. Tried both the trackpad and a generic USB mouse. No luck.
I'm also having the same problem on my 14" MacBook Pro (M1 Pro) running MacOS 12.4
Works on my iMac (Retina 5K, 27-inch, Late 2015)
Works on my MacBook Air (M2, 2022)
ehlo the last version worked with scrolling. It only became an issue with the current release.
Same as MemeScreen: 0.99.120.1-beta worked like a charm for me!
For me personally, vertical scrolling has never worked on any version of Orion without holding the shift key.
ajgraves What OS are you using?
MemeScreen Monterey then Ventura.
Is there anything we can do to help you solve this or at least narrow the problem down?
Until now we know:
I guess that’s not enough to understand what goes wrong. Orion is my favourite browser but I needed to switch because my job requires having lots of tabs open. 
happening for me on M1 - Monterrey 12.6.
Steps to reproduce:
Opened over 16+ Tabs, (research), and noted that Tabs on the left (or 'offscreen) had no way for me to 'locate them, or click them' they were basically 'out of range'
Expected behavior:
Was expecting maybe some form of pagination (obvious way) to navigate to overflow tabs.
Orion, OS version; hardware type:
Version 0.99.121.1-beta (WebKit 614.1.20)
MBPro, i9, 2019
Image/Video:
Steps to reproduce:
If you open 11 tabs with two pinned tabs, the first one will disappear.
You can access them with cmd+number of the tab, but there is no scrolling on the menu bar, and if I want to click on them, I have to close the open tabs until they appear again.
Orion, OS version; hardware type:
MacBook Pro (macOS Monterey 12.6.1 build 21G217)
Version 0.99.121.1-beta (WebKit 614.1.20)
