in src/background.js [552:575]
async function containFacebook (request) {
if (tabsWaitingToLoad[request.tabId]) {
// Cleanup just to make sure we don't get a race-condition with startup reopening
delete tabsWaitingToLoad[request.tabId];
}
// Listen to requests and open Facebook into its Container,
// open other sites into the default tab context
if (request.tabId === -1) {
// Request doesn't belong to a tab
return;
}
const tab = await browser.tabs.get(request.tabId);
updateBrowserActionIcon(tab);
const url = new URL(request.url);
const urlSearchParm = new URLSearchParams(url.search);
if (urlSearchParm.has("fbclid")) {
return {redirectUrl: stripFbclid(request.url)};
}
return maybeReopenTab(request.url, tab, request);
}