Is Reader Mode Safe? — Extension Safety Profile

Reader Mode asks for permissions that let it read and modify every website you visit. The host access, combined with the scripting and tabs permissions, means it can inject code into any page to extract text and reformat it. This scope of access is higher than many simpler reading tools but is generally expected for a reading mode extension, which must be able to restyle the page content you are viewing. The activeTab and contextMenus permissions allow it to act on your current tab or when you right-click, which is a common way to trigger the reader view.

For any reading mode or browser customization extension, a careful user should be aware that the ability to modify page content carries inherent risks. While the extension's declared purpose is to clean up articles for easier reading, the wide host permissions mean it technically could read sensitive page content like messages or financial information, even if there is no evidence it does so. Extensions in this category are sometimes acquired and repurposed to inject ads or affiliate links, so users should monitor the extension for unexpected changes in behavior after updates.

According to the fact sheet, the strongest dimension is Data & Privacy, with the developer declaring they do not sell data or use it for unrelated or creditworthiness purposes. The weakest dimension is Permissions & Access, reflecting the broad reach this extension has over all websites you visit, which lowers its score in that area despite being typical for its function.