Trigvanta

Trigvanta Connector (browser extension)

Reads posts from platforms you are already logged into in the browser. No developer app or API key needed.

Chrome, Edge, Brave, Opera, Vivaldi, Ghost Browser

Unpack the zip file
Open chrome://extensions
Turn on "Developer mode"
Click "Load unpacked" and choose the unpacked folder

Firefox

Unpack the zip file
Open about:debugging#/runtime/this-firefox
Click "Load Temporary Add-on"
Choose manifest.json in the unpacked folder

Important for Firefox: this way of loading the extension is temporary and disappears every time Firefox restarts - you will then need to redo steps 2-4. Chrome and others save the extension permanently. A permanent Firefox extension requires publishing on addons.mozilla.org (free, but goes through Mozilla review).

Does not work in Tor Browser: Tor Browser is built so every user looks identical, a tracking-free "fingerprint". Extra extensions break that, which is why the Tor Project itself explicitly advises against installing extensions for exactly this reason. An extension that reads your logged-in Facebook/Instagram data in Tor also does the opposite of what Tor is for: it ties your identity to your Tor session. Use Chrome, Firefox, or a Chromium-based multi-account browser (e.g. Ghost Browser) instead, they work without restriction.