I want to see what scripts web pages load into memory because sometimes they are malicious and I do not see what content or process is triggered.
closed as too broad by Steffen Ullrich, symcbean, grochmal, John Deters, S.L. Barth Dec 19 '16 at 6:07
Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
More than CSS, IMG, Media, Font....etc
In Firefox browser, you can open debugger,set a breakpoint, inspect elements... by Firefox Developer Tools. Read more in that link
In opera browser, Opera Dragonfly — our fully-featured suite of developer tools, designed to make your job easier. It’s just a right-click away. No install required.Futher more you can search opera dragonfly