SEOInfo is available for the Chrome, Firefox and Brave browsers. As such, it can be installed from each browser respective application store:
Chrome, Edge, Brave: SEOInfo page on Chrome web store
Visit the page that corresponds to your browser then click the
Add to Firefox or
Add to Chrome buttons to add the extension to your browser.
SEOInfo is updated automatically by your browser whenever a new version is made available. Note that it can take up to a few days for your browser to update your extension from the time the new version is accepted on the extension store.
Should you wish to remove SEOInfo from your browser, you should remove the extension from your browser "Add-ons" or "Extensions" page.