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While Slack quickly fixed this issue, it illustrates how simple coding errors can produce unexpected results when the user agent changes to version 100. In this case, the issue appears to be a bug with Slack comparing the version numbers are strings rather than numbers (integers).
![mozilla firefox will not open any websites mozilla firefox will not open any websites](https://i.ytimg.com/vi/waT1hFu0WsQ/maxresdefault.jpg)
"I discovered Slack's message popup menu's buttons (such as "Add reaction" or "Reply in thread") stop working for Firefox versions >= 100 and = 520," explained Peterson. Peterson said he has been testing using the browser with a "Firefox/100.0" user agent string for about four months and has only encountered an issue when using Slack. 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.
MOZILLA FIREFOX WILL NOT OPEN ANY WEBSITES SOFTWARE
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. 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.