Bug ID 699772: Chromebook legal browser detected as running selenium by Proactive Bot Defense

Last Modified: Jul 12, 2023

Affected Product(s):
BIG-IP ASM(all modules)

Fixed In:

Opened: Dec 21, 2017

Severity: 3-Major


No real impact to the traffic, when selenium only is detected, but if the Proactive Bot Defense detects other headless browser properties in couple with the selenium detection it could lead to the headless browser detection score above limits and drop the request.


No real impact to the traffic.


1. ASM or DoS Provisioned. 2. DoS Application profile assigned to a virtual server. 3. Proactive Bot Defense and Block suspicious browsers sections are enabled in the DoS Application profile configuration.


Disable Proactive Bot Defense or change browser_legit_min_score_drop sys db to be higher value. list sys db dosl7.browser_legit_min_score_drop sys db dosl7.browser_legit_min_score_drop { value "120" }

Fix Information

Selenium detection is changed for chromebooks

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips