var ext_api = chrome || browser; var manifestData = ext_api.runtime.getManifest(); var versionString = 'v' + manifestData.version; document.getElementById('version').innerText = versionString; const manifest_new = 'https://bitbucket.org/magnolia1234/bypass-paywalls-firefox-clean/downloads/manifest.json'; fetch(manifest_new) .then(response => { if (response.ok) { response.json().then(json => { var version_new = json['version']; if (version_new > manifestData.version) { var versionString_new = document.getElementById('version_new'); versionString_new.appendChild(document.createTextNode(' * ')); var anchorEl = document.createElement('a'); anchorEl.text = 'New release v' + version_new; anchorEl.href = 'https://bitbucket.org/magnolia1234/bypass-paywalls-firefox-clean/downloads'; anchorEl.target = '_blank'; versionString_new.appendChild(anchorEl); } }) } });