If an extension has modify access to all the web pages you visit, it could act as a keylogger, intercept credit card information, track you online, insert advertisements, and perform a variety of other nefarious activities. You should consider the ramifications of this very carefully. Once again, I'd like to point out that browser extensions often require the ability to read and/or change everything on the web pages you visit. Additionally, that article received a ton of feedback that has been taken into account for this update. Since that article was published, one extension I recommended (Xmarks) has been discontinued. In the first article, I asked readers: 'Which extensions should you install?' To reiterate, that decision largely comes down to how you use your browser, your views on privacy, how much you trust extension developers, and other personal preferences.

Extensions for Firefox are built using the WebExtensions API, a cross-browser development system.

Modern browsers have evolved into powerful and extensible platforms, and extensions can add or modify their functionality.

Welcome to the communityĪs I mentioned in my original article on Firefox extensions, the web browser has become a critical component of the computing experience for many users.

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