Does not work correctly with nested brackets.
For example, if you want to eradicate youtube playlists, you'd better locate &list parameter and rebuild the URL without it.
Rather than identifying all parameters for careful string composition.
E.g.
(https?://)?(www\.)?youtube\.com/(watch\?)?((&?v=[^&]*)|(([&#]t=([\d]*h)?)([\d]*m)?([\d]*s?))|(&?index=[\d]*)|(&?list=[^&]*))*
has nested parentheses which are not parsed correctly by this extension.
I'd propose to use
(https?://)(www\.)youtube.com/watch\?(.*)(&?list=[^&]*)(.*)
with this replacement
$1$2youtube.com/watch?$3$5
This way parameter &index= will remain, but won't have any effect.
And the result will be removal of &list parameter which I am talking about.

I'm running this with FF v50 32-bit. Works great! I use it so 2 more URLs end up at 1 to eliminate duplicate entries in LastPass. (For example, http://10.1.2.3->http://realhost and http://alias->http://realhost. Then, save only a login entry for "realhost".)

Not much to say about this, other than it works, and works well. Seems to be exactly as powerful as it needs to be.

This was a great addon but it doesn't work on Firefox Developer Edition 51.0a2. Although Developer Edition may not officially be supported but does anyone know a solution for this?

Updated on Nov 8:
Hi Einar, thank you for your reply and I'm sorry that the above behavior may have been because of my configuration issue. This addon works fine on Firefox Developer Edition 51.0a2.

great add-on, easy and useful. but it lacks the support for redirecting to (file:///) URI on local machine.

Save lot of time when debugging !

powerful and works well - thanks for your work

Used it to force firefox to use port 8080 instead of 80 for a specific site. At first it seemed to work alright, but then I saw that when submitting form data it doesn't perform the redirect.

The latest version available when updating is 3.1.0 (updated on August 5 2016), which isn't working with FF 48.0 (redirection rules aren't saved).

Update:

Found out what's causing the problem. The addon "RequestPolicy Continued 1.0beta12.3" prevents Redirector 3.1.0 from working properly.

When I go to create a new redirector, the Save button is greyed out. Should I use an older version that's compatible?

It does not work in the last days on Firefox 48 + Redirector 3.1.0.
Not saved settings redirects.

Does exactly what it says on the tin.