I just noticed current Nightly reports a No for Script Execution Events on Html5test, but looks like previous version were reporting Yes.

mozregression info: Last good revision: 883e17fc475f (2015-04-06) First bad revision: ab0490972e1e (2015-04-07) Pushlog: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=883e17fc475f&tochange=ab0490972e1e Last good revision: 0613b7a78686 First bad revision: 183190289b9c Pushlog: https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=0613b7a78686&tochange=183190289b9c Sebastian

Looks like it's related to CSP, I see blocked messages in the console when the page runs

You're right. To be specific, the following message relates to the test on html5test.com: Content Security Policy: The page's settings blocked the loading of a resource at data:text/javascript;charset=utf-8,window ("default-src 'unsafe-inline' *"). This indicates that this is caused by the changes of bug 1086999. The related spec says[1] that the data: scheme is not included in the '*' CSP. So this seems to be rather a bug on html5test.com than in Firefox, as the CSP there looks like this: default-src 'unsafe-inline' *; frame-src *; options inline-script; Therefore I filed an issue for html5test.com: https://github.com/NielsLeenheer/html5test/issues/387 Sebastian [1] http://www.w3.org/TR/CSP11/#match-source-expression

should we move this as an open bug in tech evang?

Ah, I see you filed a bug on github, thanks!

(In reply to Marco Bonardo [::mak] from comment #4) > should we move this as an open bug in tech evang? There's already some discussion about that in bug 1086999. You may ask there again. Sebastian