[
       /*{ "keys": ["alt+f12"],
            "command": "side_bar_open_in_browser",
            "args":{"paths":[], "type":"production", "browser":""}
        },*/
          { "keys": ["ctrl+shift+c"], "command": "copy_path" },
          //chrome
    { "keys": ["f1"], "command": "side_bar_files_open_with",
            "args": {
                "paths": [],
                "application": "D://360//360Chrome//Chrome//Application//360chrome.exe",
                "extensions":".*"
            }
     },
    //firefox
    { "keys": ["f2"], "command": "side_bar_files_open_with",
             "args": {
                "paths": [],
                "application": "D://Firefox//firefox.exe",
                "extensions":".*" //匹配任何文件类型
            }
    },
    //ie
     { "keys": ["f3"], "command": "side_bar_files_open_with",
             "args": {
                "paths": [],
                "application": "C://Program Files//Internet Explorer//iexplore.exe",
                "extensions":".*"
            }
    },
    ]

F1用360极速浏览器打开，F2打开火狐打开，F3IE打开，可以按照格式加F4、F5...，具体路径改成自己浏览器的位置

在这找到的->http://www.tuicool.com/articles/36FNJbv

保存后可以用别的浏览器打开

可以的，还可以在配置文件中选择次浏览器，具体的操作方法请到官网查看。