Default User Agent used in Web Browser monitors

Default User Agent used in Web Transaction (Browser) and Webpage Speed (Browser) monitors

Site24x7 Web Transaction (Browser) and Webpage Speed (Browser) monitors use the following user agents for monitoring, 

FFV83 - Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0.247) Gecko/20100101 Firefox/83.0 Site24x7
ChromeV88 - Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0 Safari/537.36.247 Site24x7

Mobile Resolution

iPhone 6/7/8
Chrome : "Mozilla/5.0 (iPhone; CPU iPhone OS 13_2_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Mobile/15E148 Safari/604.1 Site24x7",    
Firefox: "Mozilla/5.0 (iPhone; CPU iPhone OS 14_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.3 Mobile/15E148 Safari/604.1 Site24x7"
iPhone 12/13 + Pro
Chrome :Mozilla/5.0 (iPhone; CPU iPhone OS 13_2_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Mobile/15E148 Safari/604.1 Site24x7    
Firefox: Mozilla/5.0 (iPhone; CPU iPhone OS 14_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.3 Mobile/15E148 Safari/604.1 Site24x7
iPhone X
Chrome :Mozilla/5.0 (iPhone; CPU iPhone OS 13_2_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Mobile/15E148 Safari/604.1 Site24x7
Firefox: Mozilla/5.0 (iPhone; CPU iPhone OS 14_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.3 Mobile/15E148 Safari/604.1 Site24x7
Galaxy S20
chrome: Mozilla/5.0 (Linux; U; Android 4.1; en-us; GT-N7100 Build/JRO03C) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 Site24x7
Firefox: Mozilla/5.0 (Linux; Android 11; SAMSUNG SM-G973U) AppleWebKit/537.36 (KHTML, like Gecko) SamsungBrowser/14.2 Chrome/88.0.4280.141 Mobile Safari/537.36 Site24x7
Pixel 2
Chrome: Mozilla/5.0 (Linux; Android 8.0.0; Pixel 2 XL Build/OPD1.170816.004) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Mobile Safari/537.36 Site24x7
Firefox: Mozilla/5.0 (Linux; Android 11; Pixel 2XL) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.152 Mobile Safari/537.36 Site24x7

Tab Resolution

iPad
Chrome: Mozilla/5.0 (iPad; CPU OS 11_0 like Mac OS X) AppleWebKit/604.1.34 (KHTML, like Gecko) Version/11.0 Mobile/15A5341f Safari/604.1 Site24x7
Firefox: Mozilla/5.0 (iPad; CPU OS 14_7_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.1.2 Mobile/15E148 Safari/604.1 Site24x7
iPad Pro
Chrome: Mozilla/5.0 (iPad; CPU OS 11_0 like Mac OS X) AppleWebKit/604.1.34 (KHTML, like Gecko) Version/11.0 Mobile/15A5341f Safari/604.1 Site24x7
Firefox: Mozilla/5.0 (iPad; CPU OS 14_7_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.1.2 Mobile/15E148 Safari/604.1 Site24x7

Surface Duo
Chrome: Mozilla/5.0 (Linux; Android 10; Surface Duo Build/2020.1211.85; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/88.0.4324.93 Mobile Safari/537.36 GSA/12.1.9.23.arm64 Site24x7
Firefox: Mozilla/5.0 (Linux; Android 10; Surface Duo) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.116 Mobile Safari/537.36 EdgA/45.11.4.5118 Site24x7

Desktop (all resolution)

Chrome: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.6422.60 Safari/537.36 Site24x7
Firefox: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:94.0) Gecko/20100101 Firefox/125.0 Site24x7
Edge: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Edge/124.0.2478.109 Safari/537.36 Site24x7

However, you can always specify a custom user agent (browser and version) in your Web Transaction (Browser) and Webpage Speed (Browser) monitor form to simulate different browser versions.