What does "Emulate Mobile Browser" under "Chromium" achieve?

I have never enabled this option. But even when I enable it I don’t see any difference.

When I use say Emulated Motorola G4, there isn’t any difference.

Hey Hariom!

When you tick the Emulate Mobile Browser box, it changes the UA string to mimic the phone you selected, resizes the window to match the device, and also throttles the CPU accordingly. Nowadays, you can do the same thing by choosing any test browser under “Chrome Device Emulation” from the Browser select option.

Here’s an example of this completely random blog that I subscribe to with mobile emulation selected:

https://www.webpagetest.org/result/210826_BiDcM8_284fa50cc23b2cff386d2b53494d68ac/

And without:

https://www.webpagetest.org/result/210826_AiDcJH_1c6900143f7ba88315d2950db36481ab/

If you run a test and don’t see any changes, could you send over a Test ID so I can have a quick peek?

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Nowadays, you can do the same thing by choosing any test browser under “Chrome Device Emulation” from the Browser select option.

I think this is the confusing part. You cleared it. Thanks.
I have been using the Browser select option only to emulate a mobile browser. But with that also there is a separate “Emulate Mobile Browser” option under “Chromium” which is my confusion.

I think it would be less confusing for users if “Emulate Mobile Browser” is disabled if the user has already chosen it using Browser select option.

I think it would be less confusing for users if “Emulate Mobile Browser” is disabled if the user has already chosen it using Browser select option.

Yeah, that makes a lot of sense! I’ll get that change made.