Browser Injector is a free Chrome add-on developed by pearnaly. It allows users to inject CSS and Javascript into webpages, providing a way to customize and modify the appearance and behavior of websites.

With Browser Injector, users can easily generate CSS rules by right-clicking on specific blocks of a webpage that they want to customize or hide. The plugin automatically generates a full CSS selector that can be easily adjusted to suit the user's needs. Additionally, users can also write and inject Javascript code.

One of the standout features of Browser Injector is its synchronization capability. The CSS and Javascript rules created with the plugin are synchronized across devices when using a browser account. This means that users can access their customizations on multiple devices seamlessly.

The add-on also supports JSON import/export of rules, making it easy to share customizations with others. Furthermore, Browser Injector offers support for four languages (English, German, French, and Italian) and has a dark theme option for those who prefer a more visually appealing interface.

For Firefox users, a version of Browser Injector is also available on the Firefox Add-ons website.

Please note that as a reviewer, I am unable to provide personal opinions or contact information. This review is based solely on the information provided.