Worked well, now it's defunct.

Unfortunately does not work on Kubuntu/Linux. I'll re-review if this is fixed, but currently it's completely useless on my platform of choice.

I installed it, pressed CTRL+Q, and Firefox immediately exited. Started Firefox, pressed CTRL+Q and the Firefox immediately exited. I guess I'll have to keep looking for an extension to fix this. :-(

Doesn't work

Please add a note to the TITLE saying that it DOESN'T work on Linux.

This doesn't work for me (Firefox 57.0.1 on Debian Stretch with i3wm)

Unfortunately, the add-on doesn't work – Ctrl+q still closes Firefox. I'm running it on two machines, both of which run the i3 window manager on Ubuntu (17.04 and 17.10, respectively) and Firefox 57.0.1.

Man, I was so sick of accidentally quitting Firefox and having to wait for it to reopen a zillion tabs gain. This extension is wonderful.

doesn't work for me

Useless on Linux

Not the right place to put this, but for Ubuntu users, here's a workaround:
* System Settings (in Ubuntu)
* Keyboard
* Shortcuts
* Custom shortcuts
* Add a new one with command ':' and any name
* Assign ctrl+Q to it.
This disables ctrl+Q for all programs, not just Firefox.

Not working on Ubuntu

it is totally useless :||||

Doesn't work on linux 14.04 - Firefox 57.0 still closes after Ctrl+Q :(

Simply works as described. Thanks!

It works well on macOS High Sierra.

Does not work on linux (as of 2017-11-21 in Firefox 57).

Does not work in Firefox 57. I'm using Ubuntu 14.04 LTS.

WebExtension, does exactly what it says on the box. Works perfectly on Firefox Quantum on OS X 10.12

Works like a charm on Windows 10 (1703)

Doesn't seem to work any more with new Firefox 57 :-(

Sorry, I don't know how to reply here, so I hope you see my edit: I am using Ubuntu 16.04. The plugin loads, but Ctrl+Q still closes the browser. Let me know if you need more info and thanks for any help!

I can confirm that this doesn't work at all under firefox 57 and linux ubuntu 17.10. I don't give a one star because it works elsewhere :-) I'm sure that the developer will fix this. Thanks for your work, and I hope for a fix in linux.