Handy Firefox extensions

Pearl Crescent Page Saver Basic
- Save a JPG/ PNG image of a page.
- Save whole page, viewable area or frame.
Live HTTP Headers
- View HTTP header of a page while browsing.
SEO for Firefox
- Aron Wall’s handy extension adds SEO stats to your Google searches.
SEOpen
- Click one-click access to SEO stats about the page your viewing.
ReloadEvery
- An automatic page refresher.
TIDY HTML Validator
- Adds HTML validation to the View Page Source of the browser.
- The validation is done by Tidy from W3c.
- This is real favourite.
DownThemAll
- A mass file downloader for Firefox.
- Handy for quickly sucking down images from a page.