Using IceCat/geckodriver with Selenium (Python)

Using IceCat/geckodriver with Selenium (Python)

[Maxim Cournoyer]

Hello,

I'm sharing this bit of knowledge as it was not obvious at all.
Selenium is hard-coded to look for 'firefox' in a couple places, even in
the serialized settings it sends to the browser instance controlled by
geckodriver.

Here's the initialization that worked using Guix on the
core-updates-frozen-batched-changes branch (where 'geckodriver' was
recently added to IceCat):

--8<---------------cut here---------------start------------->8---
from selenium.webdriver import Firefox, FirefoxOptions
# Monkey patch the KEY string for IceCat.
FirefoxOptions.KEY = "moz:icecatOptions"
options = FirefoxOptions()
options.headless = False
options.binary = 'icecat'
options.set_capability('browserName', 'icecat')
self.driver = Firefox(options=options)# TODO:
--8<---------------cut here---------------end--------------->8---

The non-obvious was monkey patching the 'moz:icecatOptions' string of
the FirefoxOptions object, and having to set the 'browserName'
capability; otherwise a capability/invalid argument execption would be
raised.

If you use chromedriver (included with) our ungoogled-chromium instead,
it is more straightforward as there is nothing to rename/monkey patch:

--8<---------------cut here---------------start------------->8---
options = ChromeOptions()
options.headless = False
self.driver = Chrome(options=options)
--8<---------------cut here---------------end--------------->8---

I hope that helps someone else :-).

Maxim

Re: Using IceCat/geckodriver with Selenium (Python)

[Luis Felipe]

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Hi, Maxim :)

On Friday, November 5th, 2021 at 6:48 PM, Maxim Cournoyer <maxim.cournoyer@gmail.com> wrote:

> Hello,
> 

> I'm sharing this bit of knowledge as it was not obvious at all.
> 

> Selenium is hard-coded to look for 'firefox' in a couple places, even in
> 

> the serialized settings it sends to the browser instance controlled by
> 

> geckodriver.
> 

> Here's the initialization that worked using Guix on the
> 

> core-updates-frozen-batched-changes branch (where 'geckodriver' was
> 

> recently added to IceCat):
> 

> --8<---------------cut here---------------start------------->8---
> 

> from selenium.webdriver import Firefox, FirefoxOptions
> 

> Monkey patch the KEY string for IceCat.
> =======================================
> 

> FirefoxOptions.KEY = "moz:icecatOptions"
> 

> options = FirefoxOptions()
> 

> options.headless = False
> 

> options.binary = 'icecat'
> 

> options.set_capability('browserName', 'icecat')
> 

> self.driver = Firefox(options=options)# TODO:
> 

> --8<---------------cut here---------------end--------------->8---
> 

> The non-obvious was monkey patching the 'moz:icecatOptions' string of
> 

> the FirefoxOptions object, and having to set the 'browserName'
> 

> capability; otherwise a capability/invalid argument execption would be
> 

> raised.

Thanks, good to know about the options and that geckodriver is there now. 



> If you use chromedriver (included with) our ungoogled-chromium instead,
> 

> it is more straightforward as there is nothing to rename/monkey patch:

Yeah, this one just works.

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