xKit was a critical third-party extension for Tumblr power users, offering mass editing, queue management, and anti-bloat features. However, the . While it can be force-installed, users encounter significant UI breakage, feature failures, and performance degradation due to Tumblr’s move to React-based architecture and Firefox’s strict WebExtension API updates.
Yes. New XKit is open-source. This means the code is visible to the public on GitHub. It does not steal your data, password, or login information. It runs strictly within your browser to modify the layout of the page. xkit tumblr firefox