const WINDOWS_UA = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.7444.163 Safari/537.36';

browser.webRequest.onBeforeSendHeaders.addListener(
  (details) => {
    const headers = details.requestHeaders || [];
    let found = false;

    for (const header of headers) {
      if (header.name && header.name.toLowerCase() === 'user-agent') {
        header.value = WINDOWS_UA;
        found = true;
        break;
      }
    }

    if (!found) {
      headers.push({ name: 'User-Agent', value: WINDOWS_UA });
    }

    return { requestHeaders: headers };
  },
  {
    urls: [
      'https://figma.com/*',
      'https://*.figma.com/*'
    ]
  },
  ['blocking', 'requestHeaders']
);