When installing an extension in Firefox, the confirmation dialog makes you wait 5 seconds before you can install the extension. I find it annoying and unnecessary, is there a way to shorten or remove the countdown so I can install extensions without waiting?
I found this:
You can easily disable the installation wait by a simple "about:config" modification.
1. Type about:config into the Firefox address bar and hit enter.
2. Click on "I'll be careful, I promise!" button.
3. Enter "security.dialog_enable_delay" into the Filter text box.
4. Double click on that preference value and change the value to 0
Yes, you can. I've done this once. Unfortunately right now I can't remember how.
UPDATE: Got it: https://addons.mozilla.org/en-US/firefox/addon/mr-tech-toolkit/developers
Just install this extension (and restart) and alongside with other features you'll get offered to remove the countdown next time you click to install an extension.