To use the massblock script, modify your common.js file to import the script. For example, at User:Yamla/common.js, I added importScript('User:Timotheus Canens/massblock.js');. Follow the instructions to bypass your browser's cache. Now, provided you have sufficient permissions, you can load Special:Massblock to use the mass block form. --Yamla (talk) 12:06, 29 October 2022 (UTC)