When conducting the test, a enrolled Firefox user will have their user agent changed to the following string with the hopes that if anything breaks, they will report it to Mozilla. "This new temporary pref can override the UA string's Firefox version." "We would like to run an experiment to test whether a UA string with a three-digit Firefox version number will break many sites," Mozilla Staff Engineering Program Manager Chris Peterson said in a bug post first spotted by Techdows. Testing whether Firefox 100 user agent breaks websitesĪs Firefox version numbers are currently two digits, Mozilla developers are investigating if anything breaks when they release Firefox Nightly version 100 in March 2022. This information allows the website to modify its response to account for different features of browsers.
When visiting a website, the user agent strings are sent to a website so that the site knows the software capabilities of the visitor. resistFingerprinting' setting set to 'True,' your user agent will be locked to 'Firefox/78.0.'įor Google Chrome 92, the current user agent is: Mozilla/5.0 (Windows NT 10.0 Win64 圆4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/.131 Safari/537.36 When a new version of a browser is released, the developers also increment the version number in the user agent string.įor example, the current user agent for Mozilla Firefox version 90 is listed below. Note: to report bugs, please visit the addon's homepage and fill the bug report form.Mozilla has launched an experiment where they change the Firefox browser user agent to a three-digit "Firefox/100.0" version to see if it will break websites.Ī user agent is a string used by a web browser that includes information about the software, including its name, version, and technologies that it uses. This list is also available in the addon's homepage, FAQ section.
This list includes more than 100 UAs for modern browsers and ranging from desktop to mobile platforms. To find a user-agent string you can either use a search engine (there are plenty of websites that provide a free UA list) or use the sample list provided in addon's options page. For each user-agent string, you can either delete or disable it for future use.Ħ. User agents can be added to the options page (more than 100 sample user-agent strings are also provided).ĥ. Toolbar popup has an ON or OFF switch button (left side).Ĥ. There is an option to change each URL to a domain from the options page.ģ. Add a custom user-agent string for each URL or website (domain).Ģ. Custom UserAgent String is an add-on that enables you to easily change your browser's user-agent by adding site-specific user-agent strings from the Options page.ġ.
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