The Firefox [https://developer.mozilla.org/en-US/docs/Tools/Web_Console Web Console] currently (version 80.0.1 as I type this) supports Javascript-context-switching to an iframe through a cd function (albeit [https://bugzilla.mozilla.org/show_bug.cgi?id=1605327 set] to be removed), as in var ifr = document.getElementById('frame_id'); cd(ifr); The same goal can be accomplished * by selecting a different Javascript context from a drop-down menu in the upper-right corner of the Web Console, as mentioned in that bug; * similarly in [https://developers.google.com/web/tools/chrome-devtools/console/reference#context Chrome DevTools] (see also an [https://stackoverflow.com/a/8581276/11064961 older SO exchange] on this). '''Question:''' Is it possible to achieve the same effect while driving Firefox headless with [https://www.npmjs.com/package/selenium-webdriver selenium-webdriver]? '''Background:''' I have a page loading a cross-origin iframe I have no control over, and would like to access DOM elements under that iframe. I can do this in the Web Console, but I have been unsuccessful in doing so via Selenium (specifically, node + the selenium-webdriver package): Selecting the relevant iframe and then switching to it with ifr = driver.findElement(By.id('frame_id')); driver.switchTo().frame(ifr); gives me access to a different DOM than what I see in the Web Console: in Selenium I do not have access to the buttons, forms, etc. available in the browser when I interact with the latter directly.