Diigolet

Diigolet is not as feature-rich as the Diigo toolbar, but it can be set-up by simple drag-and-drop - no download or installation needed, and it works for all major browsers. Much more powerful than bookmarklets offered by other social bookmarking sites, Diigolet is a "super bookmarklet" that allows you to highlight and add sticky-notes, in addition to simple bookmarking.
You can get started by watching a tutorial video.

Firefox

1. Make sure the "Bookmarks Toolbar" is visible. If it is not, go to menu View > Toolbars.
2. Drag this button: Diigolet up to your Bookmarks Toolbar.

Internet Explorer

1. Make sure your "Favorites Bar" is visible. If it is not, right click on any part of the menu bar and make sure "Favorites Bar" is checked.
2. Right click this button: Diigolet and click "Add to Favorites..."
3. Click "Yes", if pop up "Security Alert" dialog.
4. Be sure to save the favorite in your "Favorites Bar" folder so that it appears in your Favorites Bar.

Safari

1. Make sure the "Bookmarks Bar" is visible. If it is not, go to the menu View > Show Bookmarks Bar.
2. Drag this button: Diigolet up to your Bookmarks Toolbar.

Google Chrome

1. Make sure the "Bookmarks Bar" is visible. If it is not, choose "Always show bookmarks bar" from the Tools menu.
2. Drag this button: Diigolet up to your Bookmarks Bar.

Opera

1. Make sure the "Personal bar" is checked under View > Toolbars.
2. Drag this button: Diigolet up to your Personal Bar.

Notice:

To make sure diigolet works in opera, you need to add diigo.com to the tursted web sites list if you are using opera 10+.

1. Opera ==> Tools ==> Preferences ==> Advanced ==> Network ==> Security ==> Trusted web sites
2. Add diigo.com. (not http://diigo.com or http://www.diigo.com)