manifest.json

{
    "manifest_version": 2,
    "name": "BiliBili Speed",
    "version": "1.0",
    "description": "Set play speed of bilibili palyer.",
    "icons": {
        "48": "logo.png"
    },
    "permissions": ["tabs", "http://*.bilibili.com/*"],
    "background": {
        "scripts": ["js/background.js"]
    },
    "browser_action": {
        "default_title": "BiliBili Speed",
        "default_icon": "logo.png",
        "default_popup": "popup.html"
    },
    "content_scripts": [{
        "matches": ["http://*.bilibili.com/*"],
        "js": ["js/speed.js"]
    }],
    "commands": {
        "speed_up": {
            "suggested_key": {
                "default": "Alt+Right"
            },
            "description": "Speed up."
        },
        "speed_down": {
            "suggested_key": {
                "default": "Alt+Left"
            },
            "description": "Speed down."
        }
    }
}