Install this extension once in the same Chrome profile you use for Jobexa. After that, Find posts opens LinkedIn search results, or Scan my feed opens your LinkedIn feed. Posts return to Jobexa automatically. Your LinkedIn password and cookies stay in Chrome.
You do not upload a file to Jobexa. Chrome asks you to approve the extension installation once.
chrome://extensions in Chrome, turn on Developer mode, and click Load unpacked.manifest.json. This adds the extension to Chrome; it does not upload anything to the website.