Bug 1429391 - Disable /webdriver/tests/navigation/current_url.py on Linux for frequent failures. r=jmaher

--HG--
extra : rebase_source : fa66880ede52e867e0bd7dce1a9621c060c1946e

testing/web-platform/meta/webdriver/tests/navigation/current_url.py.ini

@@ -0,0 +1,3 @@
+[current_url.py]
+  disabled:
+    if (os == "linux"): https://bugzilla.mozilla.org/show_bug.cgi?id=1429391