Screenshot of the issue. Can you update to 96.0.3 and see if you have the same issue?

I have 96.0.3 and my bookmark drop-downs are to the right; menu drop-downs are the same. Honestly, I don't remember them being different. I don't use the Bookmarks Toolbar so I can't verify this but you may be able to place a flexible spacer using Customize. You won't be able to do that if your bookmarks take up all the space.

Firefox prefers to open bookmarks folder content to the right, but may change to opening the folder content to the left in case some names are too long and do not fit when opening to the right. In such a case you can edit very long bookmark titles and make them shorter and make them take up less horizontal space (you may have to scroll a long list to get all long titles).

Screenshot of the issue. Can you update to 96.0.3 and see if you have the same issue?

Here's a picture of what I mean. It'll go left if I fullscreen the browser since there's not enough room to the right, but I don't want that. Is there a way to force it to go left all the time?

Just to be sure: Are you using code in userChrome.css to modify the appearance of the user interface (Bookmarks Toolbar) as that can cause issues ?

• https://www.userchrome.org/what-is-userchrome-css.html

You do not show a full screenshot, so it is not possible to see how much space there is at the left side or the right side available within the screen dimensions. Like I wrote above, if there is enough space at the right side then Firefox might prefer to open the folder content to the right.