Bug 1705492 - disable browser_tabopen.js on Mac_opt and Linux_opt for frequent failures. r=intermittent-reviewers,MasterWayZ DONTBUILD

Differential Revision: https://phabricator.services.mozilla.com/D137592

browser/base/content/test/performance/browser.ini

@@ -59,6 +59,8 @@ skip-if =
 [browser_tabopen.js]
 skip-if =
   apple_catalina # Bug 1594274
+  os == 'mac' && !debug # Bug 1705492
+  os == 'linux' && !debug # Bug 1705492
 [browser_tabopen_squeeze.js]
 [browser_tabstrip_overflow_underflow.js]
 skip-if = (verify && !debug && (os == 'win')) || (os == 'win' && bits == 32) # Bug 1502255