How to setup portable Firefox using selenium/python on windows?

Question

I've tried this python script to open a url in portable Firefox on windows, but I get SessionNotCreatedException traceback.

from selenium import webdriver
from selenium.webdriver.firefox.firefox_binary import FirefoxBinary
binary = FirefoxBinary('path\\to\\FirefoxPortable32.exe')
exec_path = "path\\to\\geckodriver32.exe"
browser = webdriver.Firefox(executable_path=exec_path, firefox_binary=binary)
browser.get('some_url')

Here's the traceback:

File "tst.py", line 20, in browser = webdriver.Firefox(executable_path=exec_path, firefox_binary=binary) File "C:\\Program Files (x86)\\Python37-32\\lib\\site-packages\\selenium\\webdriver\\firefox\\webdriver.py", line 174, in init keep_alive=True) File "C:\\Program Files (x86)\\Python37-32\\lib\\site-packages\\selenium\\webdriver\\remote\\webdriver.py", line 157, in init self.start_session(capabilities, browser_profile) File "C:\\Program Files (x86)\\Python37-32\\lib\\site-packages\\selenium\\webdriver\\remote\\webdriver.py", line 252, in start_session response = self.execute(Command.NEW_SESSION, parameters) File "C:\\Program Files (x86)\\Python37-32\\lib\\site-packages\\selenium\\webdriver\\remote\\webdriver.py", line 321, in execute self.error_handler.check_response(response) File "C:\\Program Files (x86)\\Python37-32\\lib\\site-packages\\selenium\\webdriver\\remote\\errorhandler.py", line 242, in check_response raise exception_class(message, screen, stacktrace) selenium.common.exceptions.SessionNotCreatedException: Messa ge: Unable to find a matching set of capabilities

I am using:

windows 7 (64 bit)
python 3.7
selenium 3.141
geckdriver v0.24.0 (64 bit)
FirefoxPortable 68.0.1 (64 bit)

Any idea how to get the portable Firefox working?

Answer 1

Change the path to Firefox binary to the firefox.exe file inside "App" folder. Eg 'path\\\\to\\\\FirefoxPortable\\\\App\\\\Firefox\\\\firefox.exe'