> if all they do is take the HTML response and send it over to some web back-end with an ajax request This extension does not do that. Most extensions with the

> if all they do is take the HTML response and send it over to some web back-end with an ajax request This extension does not do that. Most extensions with the "Access your data for all websites" permission also do not do that. The permission is required to scan data (in this case, links) in the websites visited by the browser, and does not mean that the data in the website would necessarily be sent to a server. Neat URL processes the links locally. You can inspect the source code of any WebExtension you have installed by downloading the package, renaming it to the .zip extension, and unzipping it (as .xpi files are equivalent to .zip files). For Firefox add-ons, right-click the "Add to Firefox" button on the extension listing, and click "Save Link As...". The code is not minified or obfuscated. https://addons.mozilla.org/en-US/firefox/addon/neat-url/ https://addons.mozilla.org/en-US/firefox/addon/neat-url/