In Firefox 77.0.1 (64-bit) tab is not exposing the console

[emibap]

Hey. Sadly, after updating to FF 77 the console access seems to be broken.

Here's the code to verify it:

const url = 'http://www.bing.com'
const timeout = 10

import Foxdriver from '@benmalka/foxdriver'

(async () => {
    console.log('FoxDriver Visiting URL: ' + url);
    const { browser, tab } = await Foxdriver.launch({
        url: url
    });

    if (!tab.hasOwnProperty('console')) {
        console.error('FoxDriver error: Tab object not exposing console.')
        process.exit([1])
    }

    try {
        await tab.console.startListeners();
    } catch(e) {
        console.error('FoxDriver error connecting to the browser console: ' + e.toString())
        process.exit([1])
    }

    // wait until page is loaded and a timeout to get the console log
    await new Promise((resolve) => setTimeout(resolve, timeout*1000))
    // Get logs and page errors
    let logs = null
    try {
        logs = await tab.console.getCachedMessages();
    } catch(e) {
        console.error('FoxDriver error getting console messages: ' + e.toString())
        process.exit([1])
    }

    console.log('FoxDriver logs:');
    console.log(logs)
    
    // close browser
    browser.close()
    console.log('FoxDriver autoclosing after ' + process.uptime() + ' seconds');

})()

I tested it on Mac OS Catalina and Windows 10.

[flotwig]

Having a similar issue - FF 77 64-bit on Linux, tab.memory is no longer available, where it was in earlier versions.

[flotwig]

This seems to be the culprit @emibap: saucelabs#17

[benmalka]

The issue is related to the new architecture change of the Tab object. There's a backward compatibility code that checks whether it is necessary to fetch the Tab's actors (using getTarget) or not (for firefox versions < 75 ). It will be fixed today

[benmalka]

#8

[benmalka]

@emibap
Please discard this block. It will always fail

if (!tab.hasOwnProperty('console')) {
console.error('FoxDriver error: Tab object not exposing console.')
process.exit([1])
}

Tab object has no actual property of 'console' before it has been called.

[benmalka]

v0.4.1 has been published to npm. Closing issue

[flotwig]

Thanks @benmalka