AVG PrivacyFix, Bitdefender TrafficLight, and the Electronic Frontier Foundation's Privacy Badger identify and block ad networks and other entities that track your Web activities.
The free extensions for Mozilla Firefox, Google Chrome, and Internet Explorer thwart trackers, block ads (in Firefox and Chrome), and rate the safety of links before you click them: Ghostery, Adblock Plus, and Web of Trust, respectively.
Browser running slow lately? One of your add-on installs may be the culprit eating your performance. Here's how to find out which one.
Lazarus: Form Recovery restores text and entire Web-form entries after accidental deletion; Clippings and Textarea Cache let you save what you type into text boxes for easy reuse. Plus, add-ons that clear form fields and show a site's nationality.
The new browser won't let new third-party add-ons run until users give the say-so, and it suggests old ones be disabled. Also: Twitter search and a tab tune-up.
Firefox 4 Mobile may be new and its add-on catalog small, but that doesn't mean that there aren't some excellent extensions available. This collection of essential add-ons will get you started.
Clear out everything but the primary content on a Web page, track the amount of time you spend working versus goofing off, and remind yourself to take a stretch break.
Mozilla programmers hope to release the first beta version of Jetpack, Firefox 4's new foundation for customization through add-ons, on Monday. It won't be feature-complete, though.
ZScaler's Blacksheep and the Electronic Frontier Foundation's HTTPS Everywhere extensions for Firefox alert you when someone is using Firesheep to capture your sign-in information.
OptimizeGoogle, GoogleSharing, TrackMeNot, BetterPrivacy, and BitDefender QuickScan help keep Google and other Web snoops from tracking your search and other browsing activity.