Screenshots does not working with FireFox

[ruslK]

Hi, this plugin working fine with Chrome, but has issues with FireFox.

Error when trying to get screenshot with Firefox:
JavascriptError: ReferenceError: html2canvas is not defined Build info: version: '3.141.59', revision: 'e82be7d358', time: '2018-11-14T08:25:53' System info: host: '*********', ip: '*************', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '1.8.0_181' Driver info: driver.version: unknown at Object.checkLegacyResponse (...\node_modules\selenium-webdriver\lib\error.js:546:15) at parseHttpResponse (...\node_modules\selenium-webdriver\lib\http.js:509:13) at doSend.then.response (...\node_modules\selenium-webdriver\lib\http.js:441:30) at process._tickCallback (internal/process/next_tick.js:68:7)

"protractor": "^5.4.2",
Firefox v74
geckodriver-v0.26.0.exe