1923335 - www.google.com - Pinch-to-zoom does not work

Status: VERIFIED FIXED

(Web Compatibility :: Site Reports, defect, P2)

Description

[Raul Bucata]

Environment:
Operating system: Android 14
Firefox version: Firefox Mobile 131.0

Steps to reproduce:

1. Navigate to: https://www.google.com/search?q=oven+mushrooms+with+fruit+&sca_esv=3b97e9d1349c0405&source=hp&ei=968CZ_S9KK3MkPIPl9mpyQo&oq=oven+mushrooms+with+fruit+&gs_lp=EhFtb2JpbGUtZ3dzLXdpei1ocCIab3ZlbiBtdXNocm9vbXMgd2l0aCBmcnVpdCAyBRAhGKABMgUQIRigATIFECEYoAEyBRAhGKABMgUQIRigATIFECEYqwIyBRAhGKsCSN5iUL8JWLtGcAF4AJABAJgB5AGgAfkOqgEGMTEuNi4xuAEDyAEA-AEBmAIToAKFEagCD8ICEBAAGAMY5QIY6gIYjAMYjwHCAhAQLhgDGOUCGOoCGIwDGI8BwgIOEC4YgAQYsQMYgwEYigXCAgsQLhiABBixAxiDAcICCxAuGIAEGMcBGK8BwgILEAAYgAQYsQMYgwHCAgUQABiABMICERAuGIAEGLEDGNEDGIMBGMcBwgIIEAAYgAQYsQPCAgsQLhiABBjRAxjHAcICDhAuGIAEGLEDGIMBGNQCwgIGEAAYFhgewgIIEAAYFhgeGA_CAgsQABiABBiGAxiKBcICBRAhGJ8FmAMOkgcGNy4xMS4xoAePeA&sclient=mobile-gws-wiz-hp
2. Pinch-to-zoom and observe

Expected Behavior:
Zooming works

Actual Behavior:
Nothing happens

Notes:

• Reproduces regardless of the status of ETP
• Reproduces in Firefox Nightly, and Firefox Release
• Does not reproduce in Chrome

Created from https://github.com/webcompat/web-bugs/issues/142464

Comment 1

[Ksenia Berezina [:ksenia]]

Pinch to zoom starts working in Firefox if I change the UA string to Chrome's.

Comment 2

[Randell Jesup [:jesup] (needinfo me)]

Same - enabling ChromeMask makes it work. We should poke Google

Comment 3

[Jeff Muizelaar [:jrmuizel]]

It could be valuable to figure out what Google is doing differently in Chrome vs. Firefox but that shouldn't block reaching out to Google.

Comment 4

[Daniel Holbert [:dholbert]]

(In reply to Jeff Muizelaar [:jrmuizel] from comment #3)

It could be valuable to figure out what Google is doing differently in Chrome vs. Firefox but that shouldn't block reaching out to Google.

Sure - it's pretty trivial actually. They're just sending the site with a different meta name="viewport" tag, depending on whether your UA string says Firefox or Chrome.

They serve the page with this meta viewport tag to Firefox (newlines added for readability)

<meta
  content="width=device-width,maximum-scale=1.0,initial-scale=1.0,minimum-scale=1.0,user-scalable=yes"
  name="viewport">

vs. whereas they use this shorter tag (notably without a maximum-scale value) if I activate Chrome Mask:

<meta
  content="width=device-width,initial-scale=1.0,minimum-scale=1.0"
  name="viewport">

The tag that they're serving to Firefox is forcing a scale factor of 1.0 and no larger or smaller, via maximum-scale=1.0,initial-scale=1.0,minimum-scale=1.0 there.

Comment 5

[Daniel Holbert [:dholbert]]

I reached out to some contacts at Google.

Comment 6

[Daniel Holbert [:dholbert]]

We got confirmation from some Google folks that they're taking a look at this.

Comment 7

[Jeff Muizelaar [:jrmuizel]]

I see the following in Firefox now:

 <meta
  content="width=device-width,initial-scale=1.0,minimum-scale=1.0"
  name="viewport">

Raul, can you confirm that this is fixed?

Comment 8

[Daniel Holbert [:dholbert]]

This is fixed on my end - I can zoom at the URL in comment 0 in Firefox release and nightly on Android.

Given that and comment 7, let's call this FIXED (Raul can verify at his convenience).

Comment 9

[Raul Bucata]

Also works for me.

Comment 10

[Mike Kaply [:mkaply]]

Yeah, I got confirmation a week ago Google explicitly fixed this.