note: in my screencast taken in a fresh profile with uBlock Origin + Stylus installed, there are zero extensions shown in the popup's unified extension menu. Some extensions do show up there if I install them, though, which is why I mention "no entries (or nearly no entries)" in the bug summary here. But they're not particularly useful for the popup window. e.g. if I install https://addons.mozilla.org/en-US/firefox/addon/about-sync/ , that one **does** show up in the menu when I perform this bug's STR. I think maybe (?) the popup window's unified-extension-menu only includes extensions that we flag as "can't read or change data on this site"? At least, that's what it seems like in my regular browsing profile. (This seems exactly-backward, the user can't do anything to the popup with these extensions, so there's no real point in surfacing them.)
Bug 1827034 Comment 3 Edit History
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note: in my screencast taken in a fresh profile with uBlock Origin + Stylus installed, there are zero extensions shown in the popup's unified extension menu. Some extensions do show up there if I install them, though, which is why I mention "no entries (or nearly no entries)" in the bug summary here. But these extensions happen to be ones that aren't particularly useful to expose UI for on the popup window. e.g. if I install https://addons.mozilla.org/en-US/firefox/addon/about-sync/ , that one **does** show up in the menu when I perform this bug's STR. I think maybe (?) the popup window's unified-extension-menu only includes extensions that we flag as "can't read or change data on this site"? At least, that's what it seems like in my regular browsing profile. (This seems exactly-backward, the user can't do anything to the popup with these extensions, so there's no real point in surfacing them.)