Scripts are like mini computer programs that you add to your browser to streamline working on mturk. There are a few that do different things.
To install scrips you'll need a script management extension. Tampermonkey is the most popular.
https://tampermonkey.net/
You add scripts to tampermonkey and can turn them on/off and edit them as needed from there.
There are a few basic categories of scripts.
Hit Catching: These auto refresh a link to a hit so that you can try to catch hits that you may have missed initially or catch multiple hits in a batch before that batch disappears. See this link for more info >
Panda
PandaCrazy is by far the most popular stand alone hit catching script
https://greasyfork.org/en/scripts/19168-jr-mturk-panda-crazy
If you use PandaCrazy you'll also want this helper script
https://greasyfork.org/en/scripts/20380-jr-mturk-panda-crazy-helper
There's a help page here that explains more about PandaCrazy
http://pandacrazy.allbyjohn.com/
Scrapers: These search mturk on a timer to make it easier to find hits to do.
The best standalone scraper right now is Hit Forker
https://greasyfork.org/en/scripts/36368-hit-forker
You can set a timer and search filters and it will display what it finds as well as refresh on the timer. You can add requesters that you like working for to the built in Include List and it will alert you when it finds a hit by that requester.
Assorted Other Scripts: Other types of scripts are usually for something specific. People have created scripts to speed up working on certain types of hits by creating hotkeys or simplifying the page layout of a hit that's designed poorly. There are too many of these to really summarize them here, since they are often specific to a particular hit.
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One convenient way to get started is the chrome extension
Mturk Suite:
https://chrome.google.com/webstore/detail/mturk-suite/iglbakfobmoijpbigmlfklckogbefnlf?hl=en-US
MTS combines several useful scripts together.
It has its own scraper,
Hit Finder, and its own hit catching script, Hit Catcher, built in.
Click to expand...