fix chrome tasks (#230)

* fix chrome

* fix: fix proxy setup

* feat&fix: add proxy support in setup and remove hardcoded proxy from example

* fix tasks

* fix chrome finished

* fix

* clean chrome_fix code

* clean chrome_fix code

---------

Co-authored-by: adlsdztony <zzl0712@connect.hku.hk>

evaluation_examples/examples/chrome/12086550-11c0-466b-b367-1d9e75b3910e.json

@@ -29,7 +29,7 @@
     "chrome"
   ],
   "evaluator": {
-    "func": "is_expected_active_tab",
+    "func": "is_expected_active_tab_approximate",
     "result": {
       "type": "active_url_from_accessTree",
       "goto_prefix": ""