Unhandled exception (9d74a047)

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 "/sdcard/zeus-scanner/var/search/selenium_search.py", line 268, in parse_search_results
tor=tor, batch=batch, xforward=forward_for
File "/sdcard/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 "/sdcard/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 144, in __init__
self.service.start()
File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/common/service.py", line 74, in start
stdout=self.log_file, stderr=self.log_file)
File "/usr/lib/python2.7/subprocess.py", line 394, in __init__
errread, errwrite)
File "/usr/lib/python2.7/subprocess.py", line 1047, in _execute_child
raise child_exception
OSError: [Errno 8] Exec format error
```

Running details:
`Linux-4.4.111-15411975-aarch64-with-Kali-kali-rolling-kali-rolling`

Commands used:
`zeus.py -d intext:mega.nz/*/*`

Log file info:
```2019-08-22 15:35:51,573;zeus-log;INFO;log file being saved to '/sdcard/zeus-scanner/log/zeus-log-6.log'
2019-08-22 15:35:51,574;zeus-log;INFO;using default search engine
2019-08-22 15:35:51,575;zeus-log;INFO;starting dork scan with query 'intext:mega.nz/*/*'
2019-08-22 15:35:51,576;zeus-log;WARNING;will not parse webcache URL's (to parse webcache pass -W)
2019-08-22 15:35:51,576;zeus-log;WARNING;only pulling URLs with GET(query) parameters (to pull all URL's pass -E)
2019-08-22 15:35:51,577;zeus-log;INFO;attempting to gather query URL
2019-08-22 15:35:51,580;zeus-log;INFO;setting up virtual display to hide the browser
2019-08-22 15:35:51,882;zeus-log;INFO;setting the browser
2019-08-22 15:35:51,954;zeus-log;ERROR;selenium_search.pyc failed to gather the URL from search engine, caught exception '[Errno 8] Exec format error' exception has been logged to current log file
Traceback (most recent call last):
File "/sdcard/zeus-scanner/var/search/selenium_search.py", line 268, in parse_search_results
tor=tor, batch=batch, xforward=forward_for
File "/sdcard/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 "/sdcard/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 144, in __init__
self.service.start()
File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/common/service.py", line 74, in start
stdout=self.log_file, stderr=self.log_file)
File "/usr/lib/python2.7/subprocess.py", line 394, in __init__
errread, errwrite)
File "/usr/lib/python2.7/subprocess.py", line 1047, in _execute_child
raise child_exception
OSError: [Errno 8] Exec format error

2019-08-22 15:36:17,934;zeus-log;INFO;Zeus got an unexpected error and will automatically create an issue for this error, please wait
2019-08-22 15:36:17,935;zeus-log;INFO;getting authorization
2019-08-22 15:36:17,938;zeus-log;INFO;extracting traceback from log file
2019-08-22 15:36:17,940;zeus-log;INFO;attempting to get firefox browser version
2019-08-22 15:36:17,963;zeus-log;ERROR;failed to run firefox
```

Start with var/search/__init__.py around line 148, then trace the callers in var/search/selenium_search.py around lines 82 and 268. Reproduce the browser setup on the reported aarch64 Linux environment and verify whether the selected geckodriver can execute; done means the scan starts without the Exec format error.

Written by the indexing model from the issue text.