love it ♥ Rated 5 out of 5 stars

One of the most powerful addon you can get. There are thousands of scripts you can install and customize your firefox how you like it.

This user has a previous review of this add-on.

Rated 5 out of 5 stars

Fantastic for managing your scripts
Just be careful of what you add.

A lovely add-on that packs a PUNCH when used right. Rated 5 out of 5 stars

As of version 3.0, all my complaints have been fixed.

First thing to mention - to get it out of the way - is that the quality of the scripts range from fantastic to horrid. The scripts shouldn't be taken into consideration here in this review though, only the program itself.

The program itself is fantastic. It runs the scripts perfectly, auto-upates them, and also provides a clear-cut GUI that makes it easy to do whatever you need to do concerning userscripts.

When coupled with high-grade, reputable scripts, this program becomes one that I put right alongside 'Adblock Edge', 'Ghostery', and 'The Fox, Only Better'.

5 out of 5 stars!

This review is for a previous version of the add-on (3.0). 

A must have! Rated 5 out of 5 stars

Very handy add-on. Couldn't do without it! :)

This review is for a previous version of the add-on (3.0). 

invalid, do not work the "Super Next Page" Rated 4 out of 5 stars

after updated 3.0, the "Super Next Page" script does not working.
"Super Next Page" is great excellent ! no substitute in similar as yet.
so...had no choice but returned to 1.15.

This review is for a previous version of the add-on (3.0). 

Greasemonkey 3.0 gives you a new LIFE & HOPE xD Rated 5 out of 5 stars

"Multi process Firefox compatibility." is a next generation of Greasemonkey

This review is for a previous version of the add-on (3.0).  This user has a previous review of this add-on.

神器之一 Rated 5 out of 5 stars

one of the greatest addon for firefox big fan

This review is for a previous version of the add-on (3.0). 

Wrong link Rated 5 out of 5 stars

Great addon, but the "Add to firefox" button at the top installs an old version!

This review is for a previous version of the add-on (2.3). 

Rated 5 out of 5 stars

Working flawlessly for me!

This review is for a previous version of the add-on (2.3). 

Rated 5 out of 5 stars

Great addon! I'd like to see it available for Android, though.

This review is for a previous version of the add-on (2.3). 

Rated 5 out of 5 stars

This is a great extension that lets me make little scripts to fiddle with the way sites I frequently use work the way I want. Great functionality, and great firefox integration.

This review is for a previous version of the add-on (2.3). 

Rated 4 out of 5 stars

Works great so far, but lacking so many features from its Chrome's counterpart (tampermonkey).

This review is for a previous version of the add-on (2.3). 

Rated 3 out of 5 stars

C'est un addon très utile pour personnaliser Firefox malheureusement il n'est plus assez perfectionné si on le compare à son équivalent pour Chrome (tampermonckey). Donc très utile mais plus assez moderne.

This review is for a previous version of the add-on (2.3). 

Rated 4 out of 5 stars

This is absolutely not abandonware (points to the review below). If you look at bugzilla reports and the github, the Greasemonkey people are very active, including working toward e10 compatibility.

With that said, this is the go addon to use scripts. It works well for most part, but in my opinion the functionality of the addon itself is falling behind its Chrome's counterpart (tampermonkey).

This review is for a previous version of the add-on (2.3). 

Rated 1 out of 5 stars

Abandonware.

This review is for a previous version of the add-on (2.3).  This user has 2 previous reviews of this add-on.

Rated 5 out of 5 stars

Легендарное дополнение, для приложений которых выпилили с маркета =)

This review is for a previous version of the add-on (2.3). 

GM+alertbox+个别脚本,导致firefox内存暴涨 Rated 5 out of 5 stars

我曾向mouseover popup image viewer作者反馈过GM+MPIV+alertbox导致火狐内存暴涨问题,他确认了内存泄漏现象,并向你提交反馈了,是GM造成,你看到了吧?MPIV改了行代码暂时解决了问题,但最新的enhanced word highlight 1.5.8+alertbox+GM2.3又出现内存暴涨现象,如果GM不解决此问题的话,其他脚本也可能导致内存泄漏,希望你尽快修复此问题,谢谢

This review is for a previous version of the add-on (2.3). 

Rated 5 out of 5 stars

This is a very helpful add-on that greatly expands the functionality of websites and Firefox in general. I find that Greasemonkey scripts are more compatible over the various iterations of Firefox.

This review is for a previous version of the add-on (2.3). 

Rated 5 out of 5 stars

Best Firefox addon there is. Makes my work 100x easier!

This review is for a previous version of the add-on (2.3). 

Rated 5 out of 5 stars

Greasemonkey is an awesome add-on. You can install scripts into it to help with things like Mturk. It works perfect and have never had any issues with it. Get it now!

This review is for a previous version of the add-on (2.3).