Free and useful Firefox browser add-0ns (Rev: 1.0)

• AutoPager v0.7.0.0.
  Install from https://addons.mozilla.org/en-US/firefox/addon/autopager/.
  Support browsers: Firefox, Google Chrome , Opera, Safari, Fennec and MicroB.
  
  AutoPager is a Firefox extension which automatically loads the next page of a site inline when you reach the end of the current page for infinite scrolling of content. By default, AutoPager works with a ton of sites, including Lifehacker, the New York Times, Digg, eBay, Amazon, Yahoo, YouTube, Flickr, Live, MSN, MySpace, Wikipedia, eBay, TaoBao, Twitter and Google. Useful in reading comics online where those comics websites normally shown only 1 image per page.
  
  

• Download YouTube Videos + Flash Video Downloader / Download-Helper v5.0.
  Install from https://addons.mozilla.org/en-US/firefox/addon/download-youtube-videos/.
  
  Download Videos from all your favorite sites like YouTube, Break, iFilms and over 50 other sites right to your desktop !
  
  

• FireShot - Webpage Screenshots: Capture + Annotate v0.93.
  Install from https://addons.mozilla.org/en-US/firefox/addon/fireshot/.
  Support browsers: Firefox, Chrome, Thunderbird, SeaMonkey and Internet Explorer.
  
  FireShot is a Firefox extension that captures, edits, annotates, organizes, exports, uploads and prints screenshots of your web pages. FireShot extension integrates with browsers to provide captures of either the entire web page or the currently visible area only or selected region. FireShot plugin also provides a set of editing and annotation tools, which let users quickly modify captures and insert text and graphical annotations. Screenshots can be saved to disk (PNG, GIF, JPEG, BMP), printed, copied to clipboard, e-mailed and sent to external editor for further processing.
  
  

• SkipScreen - Incredible Rapidshare and Megaupload download helper v0.6.1.2.
  Install from https://addons.mozilla.org/en-US/firefox/addon/skipscreen-incredible-rapidsha/.
  
  SkipScreen is a free Firefox add-on that skips the clicking and waiting on sites like RapidShare, Megaupload, Mediafire, zShare, Uploaded.to, Sharebee, DepositFiles, Sendspace, Divshare, Linkbucks, Link-protector, etc.
  
  

• Web Developer v1.1.9.
  Install from https://addons.mozilla.org/en-US/firefox/addon/web-developer/.
  Support browsers: Firefox and Chrome.
  
  The Web Developer extension adds various web developer tools to a browser. If you surf a website and cannot right-click to copy the images, or cannot copy the content from a website, at the Firefox Web Developer Toolbar, please kindly click "Disable" -> "Disable Javascript" -> "All Javascript".