We're a web agency with 100+ clients, some of whom may have legacy Flash running on their websites.
With Google's aggressive move away from Flash (which we fully support) we want to give our clients as much support as we can to retire Flash.
However we have no clear way to identify which sites are using Flash - especially as it's possible to embed Flash objects in some CMSs (so it won't show up in our code repositories).
What is the easiest way to detect Flash use across multiple websites? Are there online services, chrome extensions or scanning software we can use?
A quick Google has only returned suggestions for searching the source code for Flash objects, which is time consuming and technically complex.