Examine source code of Joshua Tree Extension

{
  "manifest_version": 3,
  "name": "JoshuaTree",
  "description": "Usability enhancements for The Housing Bubble Blog (http://housingbubble.blog)",
  "version": "4.13.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "joshuatree@drumminj.com"
    }
  },
  "icons": {
    "16": "images/jt16.png",
    "32": "images/jt32.png",
    "48": "images/jt48.png",
    "128": "images/jt128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://housingbubble.blog/",
        "*://housingbubble.blog/*/",
        "*://housingbubble.blog/?paged=*"
      ],
      "css": [
        "css/joshuatree.css",
        "css/loadIndicator.css",
        "css/overrides.css"
      ],
      "js": [
        "scripts/animation.js",
        "scripts/commentData.js",
        "scripts/loadIndicator.js",
        "scripts/resources.js",
        "scripts/utility.js",
        "scripts/storage.js",
        "scripts/joshuatree-mainpage.js"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "*://housingbubble.blog/?p=*"
      ],
      "css": [
        "css/contextmenu.css",
        "css/joshuatree.css",
        "css/loadIndicator.css",
        "css/overrides.css",
        "css/toolbar.css"
      ],
      "js": [
        "scripts/animation.js",
        "scripts/comment.js",
        "scripts/commentData.js",
        "scripts/commentProcessor.js",
        "scripts/contextMenu.js",
        "scripts/editorEnhancements.js",
        "scripts/htmlValidator.js",
        "scripts/loadIndicator.js",
        "scripts/options.js",
        "scripts/preferences.js",
        "scripts/resources.js",
        "scripts/utility.js",
        "scripts/storage.js",
        "scripts/toolbar.js",
        "scripts/joshuatree.js"
      ],
      "run_at": "document_end"
    }
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "permissions": [
    "storage"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "images/*.png",
        "images/*.gif"
      ],
      "matches": [
        "*://housingbubble.blog/*"
      ]
    }
  ]
}