我收到以下错误Manifest is not valid JSON. Line: 5, column: 25, Syntax error.
我的manifest.json文件
{
"name":"webrun",
"manifest_version":0.5.1,
"description":"Let code run in web!",
"browser_action":{
"default_icon":"icon.png",
"default_title":"webrun",
"default_popup":"index.html"
}
}