When on a IMDb page, click button to go to corresponding letterboxd page. There was once an addon like this but it got removed(?). Redirect based on https://bookmarkify.it/6479
What is goto letterboxd?
goto letterboxd is a Firefox add-on that allows you to easily navigate from IMDb pages to Letterboxd pages by simply clicking a button. It provides a seamless redirect based on the bookmarkify.it/6479 URL.
goto letterboxd may not be safe to use and it requires some risky permissions. Exercise caution when installing this add-on. Review carefully before installing.
goto letterboxd has earned a fairly good reputation and likely can be trusted.