Bug ID 742142: Errors in browser console in browser verification challenge

Last Modified: Nov 22, 2021

Bug Tracker

Affected Product:  See more info
BIG-IP ASM(all modules)

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3,,,,,,,, 12.1.4,, 12.1.5,,,, 12.1.6, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,, 14.0.0,,,,,, 14.0.1,, 14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3,, 14.1.4,,,,, 15.0.0, 15.0.1,,,,

Opened: Aug 30, 2018
Severity: 5-Cosmetic


When enabling Browser Verification on the Bot Defense profile, or Suspicious Clients on the Web Scraping feature of the ASM Policy, the following error messages may be shown in the console of the end users' (clients) browsers that are accessing the virtual server. These messages are cosmetic-only, and do not indicate any functional problem. They are displayed only when the end user opens the browser's Developer Tools to look at the Browser Console. The messages are: -- Not allowed to load local resource: chrome://rumola/content/rumola48.png -- GET chrome-extension://invalid/ 0 () -- [Violation] Added synchronous DOM mutation listener to a 'DOMNodeInserted' event. Consider using MutationObserver to make the page more responsive. -- [Deprecation] 'webkitURL' is deprecated. Please use 'URL' instead. -- The Web Audio autoplay policy will be re-enabled in Chrome 70 (October 2018). Please check that your website is compatible with it.


Cosmetic error messages appear in the browser's console when opened.


-- Browser Verification is enabled on the Bot Defense profile, or Suspicious Clients on the Web Scraping feature of the ASM Policy -- End user client accesses the virtual server and opens the Developer Tools of the browser.



Fix Information


Behavior Change