Is CrxMouse: Mouse Gestures Safe? — Extension Safety Profile

The permissions requested by CrxMouse grant it broad access to your browsing. Host permissions for all websites combined with the scripting and webRequest APIs mean it can read and modify any page you visit, see network requests, and monitor your navigation. It can also read and write your clipboard, access bookmarks, and store unlimited data locally. While running on every page is necessary to detect mouse gestures anywhere, the inclusion of webRequest and bookmarks access goes beyond the core functionality of a typical mouse gesture tool, which contributes to the lower permissions score.

Productivity extensions with such extensive host access can potentially observe and record your online activity. A careful user should consider whether they trust the publisher with the web history and user activity the developer says it collects. For mouse gesture tools, there is a risk that a cloned or compromised version could quietly log keystrokes or mouse movements, so installing from the official store listing and reviewing any significant permission updates is advised.

The fact sheet shows that the extension’s weakest dimension is Permissions & Access, reflecting its high scope relative to expectations. Its strongest dimension is Maintenance & Ownership, indicating it is actively maintained and its ownership is clear, which reduces the risk of an abandoned extension becoming a security liability but does not alter the inherent permission breadth.