As the subject reads, webdriver.ActionChains(driver).send_keys(Keys.ESCAPE).perform() is not working in Firefox.
This issue only occurs in AppD. Support and I cannot reproduce the issue locally.
Support has created SYNTH-6266. I don't have any hope it will be fixed in 2020.
I am asking the community to provide me a different method to Esc out of a pop-up without knowing any information about the pop-up like XPATH, ID, Name, etc.
The pop-up I am using this for are Pendo pop-ups. Unfortunately, the environment that has this pop-up is not accessible from the Cloud for me to provide you an example.