Bug 1448450 - Disable browser_dbg-babel-preview.js for frequent failures on windows opt. r=jmaher

devtools/client/debugger/new/test/mochitest/browser.ini

@@ -150,7 +150,7 @@ skip-if = (os == "win" && ccov) # Bug 1453549
 skip-if = ccov # Bug 1441545
 [browser_dbg-babel-stepping.js]
 [browser_dbg-babel-preview.js]
-skip-if = (os == "win" && ccov) # Bug 1448523
+skip-if = (os == "win" && ccov) || (os == "win" && !debug) # Bug 1448523, Bug 1448450
 [browser_dbg-breaking.js]
 [browser_dbg-breaking-from-console.js]
 [browser_dbg-breakpoints.js]