I got the idea from using Microsoft Edge on my Windows machine. It is similar to what is currently implemented in Orion but currently there is only the favicon to represent the tab. A reasoning for this suggestion is being lost when there is more than one tab from the same website (take Reddit for example).
Make the sidebar wider by dragging the right-hand side of it. This shows the tab name, when there is enough space.
eirk Oh dang I didn't know the sidebar could be draggable. Thanks 
mattsupichu That is a big problem!
What made you think it wasn't? Or what could make you think it is?
Vlad a small point ā when hovering the divide between the vertical Tab Bar and the page, the cursor swapped to left pointing arrow, implying the divider could only be dragged left.
In fact the divider could not be dragged any further left, and the only useful function of dragging the divider is to reveal the page titles by dragging right.
Hovering the divider top of window, between the Tab Bar and window Toolbar shows the more appropriate left/right arrow cursor, but again, I can't drag any further left so in theory at this point the arrow should be pointing right, but I think the left/right arrow is macOS convention.
Observe in Safari, while mouse-down, once I've dragged the max distance left (to collapse the Tab Group sidebar) the cursor swaps to the right arrow variant, suggesting that's the only way to drag at this point.
That could help a little, but it doesn't solve for discoverability ā there's no current signifier to draw one into hovering the divider in the first place, but this is true of this convention on macOS in general.
Some ways to maybe signify that it could be resizable:
Show a little bit of the title when the user first enables the tabs to sidebar feature.
This should already be the case?
Have an oval with 3 dots separating the sidebar and main browser screen.
Do you have an example from any macOS app with ths?
Personally Iād suggest sticking with the OS convention that the cursor is the signifier.
This should already be the case?
I didn't see that according to my first image. Probably because my testing of the sidebar was limited to those two tabs
Unfortunately I don't have an example with the oval and dots idea. I don't remember where I saw it from but it could be that its a website UX idea.
mattsupichu Way too annoying. It should be common sense that you expand it, or make the default size larger by default.
I would personally just make the default size larger, just enough to see half of the website title text.
