tenfourfox/dom/workers/test/serviceworkers/app-protocol/sw.js

const kHTTPRedirect = "http://example.com/tests/dom/workers/test/serviceworkers/app-protocol/redirect.sjs";
const kHTTPSRedirect = "https://example.com/tests/dom/workers/test/serviceworkers/app-protocol/redirect-https.sjs";

self.addEventListener('install', (event) => {
  event.waitUntil(
    self.caches.open("origin-app-cache")
      .then(c => {
        return Promise.all(
          [
            c.add(kHTTPRedirect),
            c.add(kHTTPSRedirect),
          ]
        );
      })
  );
});

self.addEventListener('fetch', (event) => {
  if (event.request.url.indexOf('foo.txt') >= 0) {
    var url = new URL(event.request.url);
    var shouldFetch = url.searchParams.get('fetch');
    if (shouldFetch) {
      event.respondWith(fetch(event.request));
      return;
    }
    event.respondWith(new Response('swresponse', {
      headers: {'Content-Type': 'text/plain'}
    }));
  }

  if (event.request.url.indexOf('test_doc_load_interception.js') >= 0 ) {
    var scriptContent = 'alert("OK: Script modified by service worker")';
    event.respondWith(new Response(scriptContent, {
      headers: {'Content-Type': 'application/javascript'}
    }));
  }

  if (event.request.url.indexOf('test_custom_content_type') >= 0) {
    event.respondWith(new Response('customContentType', {
      headers: {'Content-Type': 'text/html'}
    }));
  }

  if (event.request.url.indexOf('redirected.html') >= 0) {
    event.respondWith(fetch(kHTTPRedirect));
  }

  if (event.request.url.indexOf('redirected-https.html') >= 0) {
    event.respondWith(fetch(kHTTPSRedirect));
  }

  if (event.request.url.indexOf('redirected-cached.html') >= 0) {
    event.respondWith(
      self.caches.open("origin-app-cache")
        .then(c => {
          return c.match(kHTTPRedirect);
        })
    );
  }

  if (event.request.url.indexOf('redirected-https-cached.html') >= 0) {
    event.respondWith(
      self.caches.open("origin-app-cache")
        .then(c => {
          return c.match(kHTTPSRedirect);
        })
    );
  }
});