How Do I Turn off Inspect Element (Q) in Firefox?

Looks like SocialCouch has a good guide on it, in which they say that:

On Firefox 13 you also need to change extensions.firebug.hideDefaultInspector. to true (you need firebug installed for this). This is found on the about:config page.

FF 14 re-enables the inspector (just for fun I guess) even if you have disabled it before.

To disable change the following in about:config

devtools.inspector.enabled                 false
devtools.styleinspector.enabled            false
extensions.firebug.hideDefaultInspector    true

I disabled many of my add-ons, including the Web Developer and FireBug. Thought i saw some post where they may cause an issue, but i can not find the pot again.

Plus i removed several older add-ons that i no longer needed or used, or were out of date.

The Inspection tool now works correctly, I can hit the "X" or Escape to close the thml inspection tools.

I also re enabled Webdeveploer Addon and Firebug, and the Inspection tool is still working. So, some add-on was not playing nicely with the FF inspection tool.

My experience with inspect element in Firefox 12 is that if you press the type of view button again it returns the page to normal regardless of whether it is HTML 3D view or style.

The above solutions to disable things in about:config doesn't work on Linux w/ newer builds 48+. Inspectors and all still popup with everything dissabled.

But with this extension you can disable shortcuts: Keybinder:
(Note above is to replace Customizable Shortcuts by Tim Taubert, which is no longer developed/removed)

Config -> Shortcut mapping -> change > (find shortcut, disable).

At least in Firefox 12 you can hit CTRL+SHIFT+I to close the window.