You can even add a search like this to your browser’s inbuilt search engines, with a string like this:
- https://searx.oloke.xyz/search?q=filetype%3Apdf+
%s&language=all (or pick another SearXNG instance here) - https://duckduckgo.com/?q=filetype%3Apdf+
%s&ia=web
The %s is the placeholder string used by both Firefox, Chromium, and many of their derivatives like LibreWolf, ZenBrowser, and Vivaldi. You’ll need to remove the spaces around it in the two URLs above (as Lemmy changed all my URLs without spaces to something different).
Clearly you didn’t read the post. You need to add filetype:pdf for the best results.