Old Reddit Forever
Old Reddit Forever is a simple extension that keeps you on Old reddit rather than any of the newer version. It is set up to automatically only to redirect the pages that are necessary (e.g. things like settings, gallery, etc.. will all still work, unlike some other extensions).
Right Click Enable/Disable- The plugin can be easily toggled by right clicking anywhere on the page, and clicking to enable / disable the plugin. This dialog will ONLY appear on reddit.com pages, so it won't clog up your menu otherwise.
Manifest V3 compatible- Will continue to work Forever. All the current other redirect plugins use an older version of Chrome Extensions, which Google has confirm will stop working at any time, this one doesn't.
No ads, no data collected, just a simple plugin that works.