When searching for a specific keyword in linkedin you can a unrelated promoted job listings. This extension hides that promoted listings.
It currently supports: English, Turkish, German, French, Spanish
https://chrome.google.com/webstore/detail/linkedin-promoted-job-hid/lhdjbkefigglffnjnkcjfecbmmaejgbn
https://addons.mozilla.org/en-US/firefox/addon/linkedin-promoted-job-hider/
For bug report and feture request just send me an email or open an issue on github.
Email: canklotsoftware@gmail.com