Changes

* <span style="background-color: #ff9900; color: white;>M3</span> Proper support for the following actions: Block requests, Reload page, Resend an existing request JS Context Switching ([https://bugzilla.mozilla.org/show_bug.cgi?id=1594726 bug 1594726], [https://bugzilla.mozilla.org/show_bug.cgi?id=1594728 bug 1594728])