var manifestData = browser.runtime.getManifest(); var versionString = 'v' + manifestData.version; document.getElementById('version').innerText = versionString; const manifest_new = 'https://raw.githubusercontent.com/magnolia1234/bypass-paywalls-firefox-clean/master/manifest.json'; fetch(manifest_new) .then(response => { if (response.ok) { response.json().then(json => { var version_new = json['version']; if (version_new > manifestData.version) { versionString_new = 'New release v' + version_new; } else { versionString_new = 'Latest release'; } document.getElementById('version_new').innerText = versionString_new; }) } });