Developer toolbar won't disable - keeps popping up when i hit shift, and is not visible in extentions list nor add-on list. how do i uninstall

for some reason, i now have a developer toolbar, even though i haven't installed this myself. what's even weirder is that it pops up every time i hit shift - thus the lack of capital letters in this post - and it doesn't show up on my extention- nor plug-in list, so i have no idea how to disable it. it shows up under the tools tab and i can shut it down there, but it shows up again whenever i hit shift.

hello Kuzuri, firefox has an in-built developer toolbar which can be brought up with the keyboard shortcut shift+f2. so this is just a guess, but maybe your keyboard's f2 key is hanging...
in case you cannot solve it that way, please enter '''about:config''' into the firefox location bar (confirm the info message in case it shows up) & search for the preference named '''devtools.toolbar.enabled''' - double-click the entry and toggle its value to '''false'''. this will generally disable the developer toolbar after you restart the browser.

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