Bug 1293992, bug 1295907 - Disable tests not suitable for Thunderbird. r=kmag

--HG--
extra : rebase_source : bf3495e7fffcfab015840355ce52f640741833ce

toolkit/mozapps/extensions/test/xpcshell/xpcshell-shared.ini

@@ -304,7 +304,9 @@ run-sequentially = Uses global XCurProcD dir.
 run-sequentially = Uses global XCurProcD dir.
 [test_sourceURI.js]
 [test_webextension_icons.js]
+skip-if = appname == "thunderbird"
 [test_webextension.js]
+skip-if = appname == "thunderbird"
 [test_webextension_install.js]
 skip-if = appname == "thunderbird"
 [test_bootstrap_globals.js]

toolkit/mozapps/extensions/test/xpcshell/xpcshell.ini

@@ -39,6 +39,7 @@ skip-if = appname != "firefox"
 [test_delay_update.js]
 [test_nodisable_hidden.js]
 [test_delay_update_webextension.js]
+skip-if = appname == "thunderbird"
 [test_dependencies.js]
 
 [include:xpcshell-shared.ini]