module Browser

def self.matchers

Order is important.
Hold the list of browser matchers. 
def self.matchers
  @matchers ||= [
    Nokia,
    UCBrowser,
    PhantomJS,
    BlackBerry,
    Opera,
    Edge,
    InternetExplorer,
    Firefox,
    Otter,
    Facebook,             # must be placed before Chrome and Safari
    Instagram,            # must be placed before Chrome and Safari
    Snapchat,             # must be placed before Chrome and Safari
    Weibo,                # must be placed before Chrome and Safari
    QQ,                   # must be placed before Chrome and Safari
    Alipay,               # must be placed before Chrome and Safari
    Electron,             # must be placed before Chrome and Safari
    Yandex,               # must be placed before Chrome and Safari
    Sputnik,              # must be placed before Chrome and Safari
    Chrome,
    Safari,
    MicroMessenger,
    Generic
  ]
end