Greasemonkey is a Mozilla Firefox extension that allows users to install scripts that make on-the-fly changes to HTML web page content on the DOMContentLoaded event, which happens immediately after it is loaded in the browser (also known as augmented browsing).
As Greasemonkey scripts are persistent, the changes made to the web pages are executed every time the page is opened, making them effectively permanent for the user running the script.
Greasemonkey can be used for adding new functions to web pages (for example, embedding price comparisons within shopping sites), fixing rendering bugs, combining data from multiple webpages, and numerous other purposes.
... contents. It works well with most of the greasemonkey scripts. By default AutoPager works with a ton of sites, including Lifehacker, the New York Times, Digg, and, of course, Google. If you want to add your own custom autopaging to unsupported sites, the site wizard feature makes it easy (first .... Free download of AutoPager 0.8.0.8
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Translation and language learning tools from within your Firefox browser. Free download of Firelang 3.9.0
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Download and archive entire websites such as forums, galleries and online books. Free download of A1 Website Download 5.1.0
Saves all images, video and Flash applets from a page to the folder you want.. Free download of Flash and Media Capture 2.0 SR2