To complain further about the new needless addition of the unmovable standalone Extensions menu, the UI is inflated and irritating.
It seems to be the new corporate vogue to make desktop applications look like mobile apps, with huge icons and oversized margins.
While this can be nice for accessibility (increased readability, etc), it should absolutely not be unchangeable. For most users, this style of UI is clunky, and the increased space taken up can actually reduce usability and harm UX (it certainly does for me).
If this new Extensions menu must be kept (and it really shouldn't be), the ability to shrink the sizing to closer resemble the classic overflow menu (and, in fact, the rest of the browser) should be added.