text: // Copyright 2021 Tamal A. Chowdhury
  
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  
  //     https://www.apache.org/licenses/LICENSE-2.0
  
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  chrome.runtime.onInstalled.addListener(function () {
    chrome.declarativeContent.onPageChanged.removeRules(undefined, function () {
      chrome.declarativeContent.onPageChanged.addRules([
        {
          conditions: [
            new chrome.declarativeContent.PageStateMatcher({
              pageUrl: { urlContains: "youtube.com" },
            }),
          ],
          actions: [new chrome.declarativeContent.ShowPageAction()],
        },
      ]);
    });
  });
  