Is Microsoft Bing Search with Rewards safe?

// chromeWS is hardcoded to "https://chrome.google.com/" — the Chrome Web Store // domain where Google's own Analytics writes the __utmz attribution cookie. if (details.channel === 'organic') { chrome.cookies.get({ url: 'https://chrome.google.com/', name: '__utmz' }, (cookie) => { if (cookie) { const channel = parseGoogleUtmzIntoChannel(cookie.value); // source_medium_campaign_content if (channel !== '') details.channel = channel; } }); }

// telemetry.js:100-147 — the stored CHANNEL (derived from Google's __utmz cookie) // is read back out of chrome.storage.local and placed in the Application Insights // event body, then POSTed to Microsoft's collector. function sendTelemetryData(type, data) { const props = { channel: storedChannel || DEFAULT_CHANNEL, // <- value parsed from __utmz dpc: storedDpc, machineId: storedMachineId, ...data, }; fetch('https://dc.services.visualstudio.com/v2/track', { method: 'POST', body: JSON.stringify({ name: 'Microsoft.ApplicationInsights.Event', data: { baseData: { properties: props } } }), }); }

// On the user's first extension-driven Bing search, after telemetry is sent, // the extension removes Google's __utmz attribution cookie from the Web Store // domain (chromeWS === 'https://chrome.google.com/'). if (eventID === 'fsnEvent') { sendTelemetryData(TELEMETRY_TYPE.FSN, { currenturl: fsnURL }); chrome.cookies.remove({ url: 'https://chrome.google.com/', name: '__utmz' }); // Google's attribution cookie chrome.cookies.remove({ url: 'https://browserdefaults.microsoft.com/', name: chrome.runtime.id }); // own cookie chrome.cookies.remove({ url: 'https://browserdefaults.chinacloudsites.cn/', name: chrome.runtime.id }); }