In reply to George's
question, here's the setup that helps me browse in Firefox on my Win7 touchscreen:
Tab Mix Plus - for advanced tab management (I made the selected tab have a strong blue colour)
Delicious Bookmarks - for syncing my bookmarks in the cloud and all my machines.
Cooliris - I rarely use it, but it's a lot of fun on my touchscreen.
Easy Drag To Go - drag an image or link to save them. Very useful for quickly saving images!
Readability - Click the button on a page to remove all distracting elements and keep the content in a big nice readable format.
Video DownloadHelper - Grab video files embedded in youTube and a huge list of obscure websites. Works on any QuickTime embeds as well.
Flashblock - blocks any Flash content until you click it. More security, less bandwidth use, less annoyance.
Firefox Showcase - gives you a big clickable list of live thumbnails for all your open tabs. You can load it in the sidebar, in a dedicated tab, or a separate window.
Konquefox - Adds buttons for Zoom in, Zoom out, and Reset zoom. I pinch the screen for zoom in and out, so I just use the Reset button.
Full Screen - adds a button and right-click menu item for toggling fullscreen. Usually I'd use F11, but on a touchscreen it's faster to click this button.
Stylish - to override a website's CSS with my own. I use it to skin Google Reader and other favourite websites of mine.
Context Search - select some text and you can instantly search for it in any of your search engines (the ones on the upper right)
Adblock Plus - disables all ads on almost all websites.
Tiny Menu - compacts the "File, Edit, View..." bar into one button.