Hello,

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Hello,

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Every devtools.*.enabled option is listed as false and the window is still popping up.

Does the scanner possibly send Ctrl+Shift+j -- the keyboard shortcut to display the Browser Console -- or a keyboard sequence that triggers the classic Tools menu (Alt t w b) ?

That was my first thought but I'm fairly positive it only produces a string of numbers. I've also tried in other applications that use shortcuts like those but haven't been able to reproduce the issue outside of firefox

Does the form where the input goes do anything strange if you type in some numbers and press Enter or Tab? Thinking there might be some kind of issue with a validation script attached to the form that might be triggered by a control character sent after the numbers.

Does that installation of Firefox have any "blocking" set up? For example, add-ons that block scripts, ads, or tracking? Also, if you are using a private window, please see: What happened to Tracking Protection?.