Unhandled exception (d9b451cd)

Zeus version:
`1.5.2.21b875`

Firefox version:
`failed to start`

Geckodriver version:
`geckodriver-v0.19.0-linux32.tar.gz`

Error info:
```Traceback (most recent call last):
File "/root/zeus-scanner/var/search/selenium_search.py", line 268, in parse_search_results
tor=tor, batch=batch, xforward=forward_for
File "/root/zeus-scanner/var/search/selenium_search.py", line 82, in get_urls
browser = var.search.SetBrowser(agent=user_agent, proxy=proxy, tor=tor, xforward=xforward).set_browser()
File "/root/zeus-scanner/var/search/__init__.py", line 148, in set_browser
executable_path=whichcraft.which("geckodriver"))
File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/firefox/webdriver.py", line 174, in __init__
keep_alive=True)
File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 157, in __init__
self.start_session(capabilities, browser_profile)
File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 252, in start_session
response = self.execute(Command.NEW_SESSION, parameters)
File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 321, in execute
self.error_handler.check_response(response)
File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/errorhandler.py", line 242, in check_response
raise exception_class(message, screen, stacktrace)
SessionNotCreatedException: Message: Failed to start browser /usr/bin/firefox: other os error
```

Running details:
`Linux-5.3.0-kali2-686-pae-i686-with-debian-kali-rolling`

Commands used:
`./zeus.py -d Products.php?id= -s`

Log file info:
```2020-01-02 22:57:23,849;zeus-log;INFO;log file being saved to '/root/zeus-scanner/log/zeus-log-39.log'
2020-01-02 22:57:23,849;zeus-log;INFO;using default search engine
2020-01-02 22:57:23,849;zeus-log;INFO;starting dork scan with query 'Products.php?id='
2020-01-02 22:57:23,850;zeus-log;WARNING;will not parse webcache URL's (to parse webcache pass -W)
2020-01-02 22:57:23,850;zeus-log;WARNING;only pulling URLs with GET(query) parameters (to pull all URL's pass -E)
2020-01-02 22:57:23,850;zeus-log;INFO;attempting to gather query URL
2020-01-02 22:57:23,850;zeus-log;INFO;setting up virtual display to hide the browser
2020-01-02 22:57:23,973;zeus-log;INFO;setting the browser
2020-01-02 22:57:26,318;zeus-log;ERROR;selenium_search.pyc failed to gather the URL from search engine, caught exception 'Message: Failed to start browser /usr/bin/firefox: other os error' exception has been logged to current log file
Traceback (most recent call last):
File "/root/zeus-scanner/var/search/selenium_search.py", line 268, in parse_search_results
tor=tor, batch=batch, xforward=forward_for
File "/root/zeus-scanner/var/search/selenium_search.py", line 82, in get_urls
browser = var.search.SetBrowser(agent=user_agent, proxy=proxy, tor=tor, xforward=xforward).set_browser()
File "/root/zeus-scanner/var/search/__init__.py", line 148, in set_browser
executable_path=whichcraft.which("geckodriver"))
File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/firefox/webdriver.py", line 174, in __init__
keep_alive=True)
File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 157, in __init__
self.start_session(capabilities, browser_profile)
File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 252, in start_session
response = self.execute(Command.NEW_SESSION, parameters)
File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 321, in execute
self.error_handler.check_response(response)
File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/errorhandler.py", line 242, in check_response
raise exception_class(message, screen, stacktrace)
SessionNotCreatedException: Message: Failed to start browser /usr/bin/firefox: other os error

2020-01-02 22:57:28,309;zeus-log;INFO;Zeus got an unexpected error and will automatically create an issue for this error, please wait
2020-01-02 22:57:28,309;zeus-log;INFO;getting authorization
2020-01-02 22:57:28,311;zeus-log;INFO;extracting traceback from log file
2020-01-02 22:57:28,311;zeus-log;INFO;attempting to get firefox browser version
2020-01-02 22:57:28,327;zeus-log;ERROR;failed to run firefox
```

Start by reproducing `./zeus.py -d Products.php?id= -s` on the reported Linux environment and read `var/search/selenium_search.py` around lines 82 and 268, plus `var/search/__init__.py` around line 148. Determine why Firefox fails to start through geckodriver and define how the scanner should handle that failure without an unhandled exception; verify the result using the same command and log path.

Written by the indexing model from the issue text.