Ga Debug

Google Analytics Debugger is a plug-in designed to work with your Google Analytics account. When used alongside your GA account, this tool helps to flag bugs or errors that could impact on the way your Analytics are reporting. This includes warning you of inaccurate analytic tracking codes, improper running of JavaScript, and a host of others. If you have had trouble using or setting up Google Analytics on your site, GA Debug can be extremely helpful in helping you get your site analytics back up and running.

https://chrome.google.com/webstore/detail/google-analytics-debugger/jnkmfdileelhofjcijamephohjechhna?hl=en