Unhandled exception (dc8e7fc3)

Zeus version:
`1.5.2.21b875`

Firefox version:
`failed to start`

Geckodriver version:
`geckodriver-v0.19.0-linux64.tar.gz`

Error info:
```Traceback (most recent call last):
File "/root/Zeus-Scanner/zeus-scanner/var/blackwidow/__init__.py", line 43, in test_connection
proxy=self.proxy
File "/root/Zeus-Scanner/zeus-scanner/lib/core/common.py", line 335, in get_page
req = requests.get(url, params=headers, proxies=proxies, verify=False, timeout=20)
File "/usr/local/lib/python2.7/dist-packages/requests/api.py", line 70, in get
return request('get', url, params=params, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/requests/api.py", line 56, in request
return session.request(method=method, url=url, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/requests/sessions.py", line 488, in request
resp = self.send(prep, **send_kwargs)
File "/usr/local/lib/python2.7/dist-packages/requests/sessions.py", line 609, in send
r = adapter.send(request, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/requests/adapters.py", line 473, in send
raise ConnectionError(err, request=request)
ConnectionError: ('Connection aborted.', BadStatusLine('No status line received - the server has closed the connection',))
```

Running details:
`Linux-4.15.0-88-generic-x86_64-with-Ubuntu-18.04-bionic`

Commands used:
`zeus.py -x -b https://sergiuv.be/movie/pages/series.vue`

Log file info:
```2020-03-25 10:51:50,336;zeus-log;INFO;log file being saved to '/root/Zeus-Scanner/zeus-scanner/log/zeus-log-12.log'
2020-03-25 10:51:50,336;zeus-log;INFO;using default search engine
2020-03-25 10:51:50,336;zeus-log;INFO;starting blackwidow on 'https://sergiuv.be/movie/pages/series.vue'
2020-03-25 10:51:50,350;zeus-log;ERROR;failed to connect to 'https://sergiuv.be/movie/pages/series.vue' received error '('Connection aborted.', BadStatusLine('No status line received - the server has closed the connection',))'
Traceback (most recent call last):
File "/root/Zeus-Scanner/zeus-scanner/var/blackwidow/__init__.py", line 43, in test_connection
proxy=self.proxy
File "/root/Zeus-Scanner/zeus-scanner/lib/core/common.py", line 335, in get_page
req = requests.get(url, params=headers, proxies=proxies, verify=False, timeout=20)
File "/usr/local/lib/python2.7/dist-packages/requests/api.py", line 70, in get
return request('get', url, params=params, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/requests/api.py", line 56, in request
return session.request(method=method, url=url, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/requests/sessions.py", line 488, in request
resp = self.send(prep, **send_kwargs)
File "/usr/local/lib/python2.7/dist-packages/requests/sessions.py", line 609, in send
r = adapter.send(request, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/requests/adapters.py", line 473, in send
raise ConnectionError(err, request=request)
ConnectionError: ('Connection aborted.', BadStatusLine('No status line received - the server has closed the connection',))

2020-03-25 10:51:52,347;zeus-log;INFO;Zeus got an unexpected error and will automatically create an issue for this error, please wait
2020-03-25 10:51:52,347;zeus-log;INFO;getting authorization
2020-03-25 10:51:52,347;zeus-log;INFO;extracting traceback from log file
2020-03-25 10:51:52,347;zeus-log;INFO;attempting to get firefox browser version
2020-03-25 10:51:52,350;zeus-log;ERROR;failed to run firefox
```

Reproduce the command against the reported URL, then read var/blackwidow/__init__.py at test_connection and lib/core/common.py at get_page. Trace how requests.ConnectionError and BadStatusLine are handled and determine what the expected behavior is when the server closes the connection; done means the failure is handled consistently and the relevant run no longer produces an unhandled exception.

Written by the indexing model from the issue text.