I need to be able to record advertisement load times for pretty much any website a client asks me to, on various browsers (Chrome, Firefox, IE, Edge, Safari), desktop browsers specifically.
I've used the Developer tools in chrome before to monitor network performance and output to a HAR file. I also have used several online tools/extensions to parse and view the HAR file data more easily.
How can I specifically filter out Ads from the rest of the data, and separate that data to present to a client?
Are there any cross browser tools that work just as well/better than Chrome/FF Dev tools to make data collection and presentation more efficient and consistent?
If there are no cross-browser tools that address all the needed browsers, which tools do I need to perform the same tasks on the various browsers?