Override Text Encoding is a Firefox add-on designed to restore and enhance character encoding functionalities that were removed from the browser. This tool allows users to manually set the character encoding for any webpage, providing a solution for pages displaying broken characters or unreadable text due to encoding issues. The add-on features a convenient toolbar button that opens a popup menu from which users can select from a variety of supported character encodings, making it user-friendly despite previous limitations of the default Firefox settings.

Users can apply character encoding overrides on a per-page basis or for entire domains, offering flexibility in managing text display. The add-on preferences allow for the editing of override lists, while two special encoding options—"Default" and "Autodetect"—enable users to choose whether to use the page's inherent encoding or to attempt autodetection. Overall, this tool is a valuable asset for those needing precise control over text encoding in their web browsing experience.