Issue with Custom User Agent Overrides Not Working

[Frittlefore]

I’ve been trying to set custom User Agent overrides for specific sites, but they don’t seem to be applying properly. I’ve followed the steps outlined in the official documentation and various forum posts, but the browser still seems to be sending the default UA string instead of my custom one.

Here’s what I’ve done so far:

Went to

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about:config

and set

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general.useragent.override.example.com

(replacing example.com with the actual site) to a custom UA string.

Verified that

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general.useragent.site_specific_overrides

is set to

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true

.

Restarted the browser to ensure changes took effect.

Used web debugging tools (F12 > Network > Headers) to check the

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User-Agent

being sent.

Despite these steps, the override doesn’t seem to take effect, and sites continue to detect the default UA string. Interestingly, if I set general.useragent.override globally, it works, but I’d prefer site-specific overrides instead of changing it for all sites.

I’m using Pale Moon 33.0.1 (64-bit) on Windows 10, and I have no major extensions installed that should interfere with this behavior.

Has anyone else encountered this issue? Is there something I might be missing, or is there a known bug affecting this feature in recent versions?

[Moonchild]

Just to be sure I verified this and it seems to work just fine. Browser restarts aren't required for these changes, by the way. They are picked up immediately.
If you are checking in the devtools/network tab, make sure that the "domain" of the request matches the domain you're trying to override.

Interestingly, if I set general.useragent.override globally, it works, but I’d prefer site-specific overrides instead of changing it for all sites.

Using "general.useragent.override" without a domain should not work. If it does, you might be using an add-on that takes over this specific functionality at the network level (in which case your initial problem might also stem from this)...

[vannilla]

If you are unsure, you can use extensions like sasuga to make sure the override is stored correctly. Making typos and not noticing is normal after all.