Which version of marionette_driver with Firefox 52.9.0esr (Tor Browser 7.5.6)

Question

The Tor Browser updated to 7.5.6. The previously working code failed with

InvalidSessionIdException:

After updating to marionette_driver 2.7, the call to client.start_session() failed with

marionette_driver.errors.UnknownCommandException: WebDriver:NewSession

Which version of the marionette_driver should be used with this Firefox version? (Or maybe another framework like Selenium?)

Answer 1

Since there are only a few version at Pypi, and no other answer seems to exist, just try them all starting with the current one.

It worked with version 2.5:

pip2 install marionette_driver==2.5

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UPDATE: The InvalidSessionIdException returned. To fix this, call client.start_session() again (it can be called when catching the exception in a try-block)