I've been a happy user of TM for a while, however the May 2023 update has broken some critical functionality involving cookies. Thankfully I have a backup of the previous version of TM.

// @grant GM_cookie

GM_cookie.list({}, function(cookies, error) {
if (!error) {
// do something useful
} else {
//error = 'not supported' every time since May 2023
console.error(error);
}