i use the side bar a lot, however, at it's smallest it still takes up a lot of space, what i would like is a feature to be able to turn the side bar into just icons, removing the text, which would look something like vivaldi's tool bar. 
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Reducing width of vertical bar
Merged 2 posts from Be able to resize/turn the sidebar into just icons.
6 months later
At it's minmum width, the vertical tab bar is about twice as wide as it needs to be. Traffic lights could be in the top bar, and then the vertical tab bar can be compressed in width much futher.
The drop-down arrow for the window selector could be moved from the right, to below the icon.
Yes, I'd also love a slim approach to this issue similar to e.g. Brave.
Merged 4 posts from Allow Vertical Tab Bar to be compressed even smaller in width..
4 days later
We further reduced the width of sidebar in the latest RC
5 months later
a month later
I hope remember vertical bar size when relaunch Orion.
And. I one idea.
normal use vertical bar as favicon only on width as ver.0.99-128.2.1RC
- mouse cursor in vertical bar -> overlap wide vertical bar. Because I want to operate the tab more than the web page.
- mouse cursor hover tab line -> overlap preview web page. Because It will be easier to check the tab. And If display all the number of open previews that have been resized to the number of vertical display dots on the display, there is a possibility that the preview will become a thumbnail if there are a large number of tabs.
3 months later
Yes please a much slimmer width would be great
3 months later
If there could be a third option perhaps, of a super slimmed down version like in Vivaldi.
And when you need to close a tab, you will need to click on it to make it an active tab and then a 'x' pops up in the middle of the favicon for you to click again to close it. See images below.
For some reason, when taking a screenshot, it doesnt capture the 'x' that displays when you you hover over the active tab favicon. But I hope what im trying to say is still clear.
16 days later
When using Vertial Tabs you have an option to totally hide the sidebar, which hides the tab window, or show the sidebar, which takes up a lot of space. I would like a third option of just showing the tab icons, and when you hover over them the full sidebar would pop out..
This is a feature avliable in edge, allowing tabs to take up a fraction of the screen relastate that the full sidebar takes.
In the image you can see Orion sidebar vs the Edge tabs: 
Merged 2 posts from Compact Vertical Tabs.
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