Bug 1628642 - Disable test_ext_streamfilter_multiple.html on all platforms for frequent failures. r=aryx

Differential Revision: https://phabricator.services.mozilla.com/D70847

--HG--
extra : moz-landing-system : lando

toolkit/components/extensions/test/mochitest/mochitest-common.ini

@@ -126,6 +126,7 @@ skip-if = os == 'android'
 [test_ext_storage_manager_capabilities.html]
 scheme=https
 [test_ext_streamfilter_multiple.html]
+skip-if = true #Bug 1628642
 [test_ext_streamfilter_processswitch.html]
 [test_ext_subframes_privileges.html]
 skip-if = os == 'android' || verify # bug 1489771