从内容脚本更改扩展图标

Question

我正在制作检测某些域的扩展程序，并且它应该根据域名更改图标，灰色徽章，红色徽章或绿色徽章。

我试图使用内容脚本：

chrome.browserAction.setIcon({
        path : {
            "16": "icons/icon16.png",
            "19": "icons/icon19.png",
            "48": "icons/icon48.png"
        }
    });

问题是，它说chrome.browserAction未定义。

这是我的manifest.json

    {
    "name": "CHANGE THIS : Extension boilerplate",
    "version": "0.1",
    "manifest_version": 2,
    "description": "This extension was created with the awesome extensionizr.com",
    "homepage_url": "http://extensionizr.com",
    "icons": {
        "16": "icons/icon16.png",
        "48": "icons/icon48.png",
        "128": "icons/icon128.png"
    },
    "default_locale": "en",
    "options_page": "src/options_custom/index.html",
    "page_action": {
        "default_icon": "icons/icon19.png",
        "default_title": "page action demo",
        "default_popup": "src/page_action/page_action.html"
    },
    "permissions": [
        "http://*/*",
        "https://*/*"
    ],
    "content_scripts": [
        {
            "matches": [
                "<all_urls>"
            ],
            "css": [
                "src/inject/inject.css"
            ]
        },
        {
            "matches": [
                "<all_urls>"
            ],
            "js": [
                "/js/jquery/jquery.min.js",
                "src/inject/inject.js"
            ]
        }
    ],
    "web_accessible_resources": ["icons/stop.png"]

    }

我可以显示初始图标，但我无法更改它。