Hello,
I’m a Firefox user and I’ve been having a big problem every time I go on the Internet for a few days now:
Your Development Tool (in Tool/Browser Tool) opens at the bottom of the page and prevents me from typing properly. No matter how hard I try to close it as soon as I start writing (here on Deepl to translate), it keeps opening and opening windows, and I can’t get out of it.
Can you help me urgently, as I’m going to have to abandon it in these conditions.
Thanks a lot! 
Hello Betty,
Can you check if the opening of the DevTools happen when you hit a specific key?
I’m wondering if your keyboard might have an issue with its Ctrl/Cmd key which would trigger one of the keyboard shortcut we offer to open devtools (see https://firefox-source-docs.mozilla.org/devtools-user/keyboard_shortcuts/index.html#keyboard-shortcuts-opening-and-closing-tools)
if you manage to identify the key that triggers the opening, could you open https://w3c.github.io/uievents/tools/key-event-viewer.html and type the key, and send a screenshot of the page please?