Examine source code of Firefox Multi-Account Containers

{
  "manifest_version": 2,
  "name": "Firefox Multi-Account Containers",
  "version": "8.3.7",
  "incognito": "not_allowed",
  "description": "__MSG_extensionDescription__",
  "icons": {
    "48": "img/multiaccountcontainer-16.svg",
    "96": "img/multiaccountcontainer-16.svg"
  },
  "homepage_url": "https://github.com/mozilla/multi-account-containers#readme",
  "permissions": [
    "<all_urls>",
    "activeTab",
    "cookies",
    "contextMenus",
    "contextualIdentities",
    "history",
    "idle",
    "management",
    "storage",
    "unlimitedStorage",
    "tabs",
    "webRequestBlocking",
    "webRequest"
  ],
  "optional_permissions": [
    "bookmarks",
    "browsingData",
    "nativeMessaging",
    "proxy"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "@testpilot-containers",
      "strict_min_version": "91.1.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Period",
        "mac": "MacCtrl+Period"
      },
      "description": "__MSG_openContainerPanel__"
    },
    "sort_tabs": {
      "description": "__MSG_sortTabsByContainer__"
    },
    "open_container_0": {
      "suggested_key": {
        "default": "Ctrl+Shift+1"
      },
      "description": "__MSG_containerShortcut__"
    },
    "open_container_1": {
      "suggested_key": {
        "default": "Ctrl+Shift+2"
      },
      "description": "__MSG_containerShortcut__"
    },
    "open_container_2": {
      "suggested_key": {
        "default": "Ctrl+Shift+3"
      },
      "description": "__MSG_containerShortcut__"
    },
    "open_container_3": {
      "suggested_key": {
        "default": "Ctrl+Shift+4"
      },
      "description": "__MSG_containerShortcut__"
    },
    "open_container_4": {
      "suggested_key": {
        "default": "Ctrl+Shift+5"
      },
      "description": "__MSG_containerShortcut__"
    },
    "open_container_5": {
      "suggested_key": {
        "default": "Ctrl+Shift+6"
      },
      "description": "__MSG_containerShortcut__"
    },
    "open_container_6": {
      "suggested_key": {
        "default": "Ctrl+Shift+7"
      },
      "description": "__MSG_containerShortcut__"
    },
    "open_container_7": {
      "suggested_key": {
        "default": "Ctrl+Shift+8"
      },
      "description": "__MSG_containerShortcut__"
    },
    "open_container_8": {
      "suggested_key": {
        "default": "Ctrl+Shift+9"
      },
      "description": "__MSG_containerShortcut__"
    },
    "open_container_9": {
      "suggested_key": {
        "default": "Ctrl+Shift+0"
      },
      "description": "__MSG_containerShortcut__"
    },
    "reopen_in_container_0": {
      "description": "__MSG_reopenInContainerShortcut__"
    },
    "reopen_in_container_1": {
      "description": "__MSG_reopenInContainerShortcut__"
    },
    "reopen_in_container_2": {
      "description": "__MSG_reopenInContainerShortcut__"
    },
    "reopen_in_container_3": {
      "description": "__MSG_reopenInContainerShortcut__"
    },
    "reopen_in_container_4": {
      "description": "__MSG_reopenInContainerShortcut__"
    },
    "reopen_in_container_5": {
      "description": "__MSG_reopenInContainerShortcut__"
    },
    "reopen_in_container_6": {
      "description": "__MSG_reopenInContainerShortcut__"
    },
    "reopen_in_container_7": {
      "description": "__MSG_reopenInContainerShortcut__"
    },
    "reopen_in_container_8": {
      "description": "__MSG_reopenInContainerShortcut__"
    },
    "reopen_in_container_9": {
      "description": "__MSG_reopenInContainerShortcut__"
    }
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": "img/multiaccountcontainer-16.svg",
    "default_title": "Firefox Multi-Account Containers",
    "default_popup": "popup.html",
    "default_area": "navbar",
    "theme_icons": [
      {
        "light": "img/multiaccountcontainer-16.svg",
        "dark": "img/multiaccountcontainer-16.svg",
        "size": 32
      }
    ]
  },
  "page_action": {
    "browser_style": true,
    "default_icon": "img/container-openin-16.svg",
    "default_title": "__MSG_alwaysOpenSiteInContainer__",
    "default_popup": "pageActionPopup.html",
    "pinned": false,
    "show_matches": [
      "*://*/*"
    ]
  },
  "background": {
    "page": "js/background/index.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "js/content-script.js"
      ],
      "css": [
        "css/content.css"
      ],
      "run_at": "document_start"
    }
  ],
  "default_locale": "en",
  "web_accessible_resources": [
    "/img/multiaccountcontainer-16.svg"
  ],
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  }
}