Bug 1775896 - update disabling condition for browser_selectpopup.js...

Bug 1775896 - update disabling condition for browser_selectpopup.js r=intermittent-reviewers,jmaher a=test-only DONTBUILD

Differential Revision: https://phabricator.services.mozilla.com/D156026

browser/base/content/test/forms/browser.ini

@@ -6,7 +6,9 @@ support-files =
 
 [browser_selectpopup.js]
 skip-if = 
-  os == "linux" || (os == "mac" && !debug) || (verify && (os == 'win')) # Bug 1329991 - linux, Bug 1661132 - osx
+  os == "linux" # Bug 1329991
+  os == "mac" # Bug 1661132, 1775896
+  verify && os == "win"
 [browser_selectpopup_colors.js]
 skip-if = os == "linux" # Bug 1329991 - test fails intermittently on Linux builds
 [browser_selectpopup_searchfocus.js]