IMDb Search от Jerry

Use the context menu (right click) to search on IMDb (imdb.com) any text from other websites.

Context menu available in 34 languages.
Also, you can put or improve your own language for the context menu.

Dark/light theme
Compatible with the native Firefox dark theme, on Firefox 78+

For a search only on movie titles:
https://addons.mozilla.org/firefox/addon/search-on-imdb-title/