I'd like to be able to lock bookmark tabs on the toolbar as sometimes when I'm clicking on one I accidentally end up moving it. It's not much of a problem but if you click the first bookmark and move it to the edge of the window, It will move to the last position on the toolbar.
Plus, I won't be changing my first few bookmarks such as Google, Youtube or BBC News at all, so It would be useful.
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I have the same problem. Lots of email, lots of inbox folders, even lots of inboxes. Lots of switching necessary between the folders and it happens more than once (in he rush), to put it mildly, that one folder becomes the sub folder of another. I think there is room for improvement.