Get user agent string from console
I open the terminal (I'm using FreeBSD) and I run: `firefox --help` and I get a lot of command line options. However there seems to be no way to simply get the user agent string. This is kind of annoying because I might want to plug the current version of my Firefox browser in some automated scripts. At the moment I need to open Firefox, then go to the console and type in: `window.navigator.userAgent` copy the string manually and paste it wherever I want to use it. It would be really nice if there could be an extra option to the `firefox` command, like: `firefox --user-agent` that prints this information in the console. Maybe there's a way, if it is it must be really hidden because I couldn't find relevant information on how to do it.
Kind regards, Lucas.
Chosen solution
Yes, the bookmarklet is meant to be used in a running Firefox application.
The user agent can be different for each profile and extensions or the user can override the user agent, so it is not possible to get the user agent from outside Firefox.
If you know the Firefox version then you can construct the agent to replacing the rv:xx.0 and Firefox/xx.0 in the default user agent for this platform and display manager (X11 or Wayland).
For the user agent you used to post this question:
- Mozilla/5.0 (X11; FreeBSD amd64; rv:xx.0) Gecko/20100101 Firefox/xx.0;
- https://searchfox.org/mozilla-release/source/build/autoconf/config.sub
All Replies (3)
You can use a JavaScript bookmarklet:
- javascript:void(prompt('navigator.userAgent',navigator.userAgent))
Hi cor-el. Thanks for your reply. I'm not fully understanding what you're suggesting. If this involves *opening* the browser then this is definitely something I don't want. The idea is not to open the browser. For example if you open a console in a Linux or BSD box and run: `firefox --version` you will get a string like: "Mozilla Firefox 89.0.2". I'm looking for a similar solution but for the user-agent (hence the suggestion of doing something like: `firefox --user-agent` in the original post). I've attached an image that displays what I'm after.
Kind regards, Lucas.
Modified by liendolucas84
Chosen Solution
Yes, the bookmarklet is meant to be used in a running Firefox application.
The user agent can be different for each profile and extensions or the user can override the user agent, so it is not possible to get the user agent from outside Firefox.
If you know the Firefox version then you can construct the agent to replacing the rv:xx.0 and Firefox/xx.0 in the default user agent for this platform and display manager (X11 or Wayland).
For the user agent you used to post this question:
- Mozilla/5.0 (X11; FreeBSD amd64; rv:xx.0) Gecko/20100101 Firefox/xx.0;
- https://searchfox.org/mozilla-release/source/build/autoconf/config.sub