1378208 - stylo: site issue: button font grows on mouseover

Status: VERIFIED DUPLICATE of bug 1379041

(Core :: CSS Parsing and Computation, defect)

Description

[Darkspirit]

Attachment: 2017-07-04_21-13-42.mp4

See attached video:
Left: with stylo, font grows on the button when you move your mouse over it
Right: without stylo, font/button size keeps the same

URL: https://schnaeppchenfuchs.com

Comment 1

[Darkspirit]

Tested with:
Nightly 56 x64 20170704100254 @ Debian Testing (Linux 4.9.0-3-amd64, Radeon RX480).

Comment 2

[Darkspirit]

This bug does not happen with a clean profile,
but with a clean profile + https://addons.mozilla.org/firefox/addon/ublock-origin/ .
In the attached video (above) you can see that I have uBlock Origin on both sides, so it should be irrelevant. I hope this makes it easier for you to find the cause.

Comment 3

[Emilio Cobos Álvarez [:emilio]]

Huh, smells like a dupe of bug 1374062, and I can't repro... :(

Though this is probably related to bug 1376897 and rem units (the button has "padding: .75rem 1.25rem;
font-size: 1.25rem")... Probably worth checking when that's fixed.

Comment 4

[Emilio Cobos Álvarez [:emilio]]

(In reply to Darkspirit from comment #2)
> This bug does not happen with a clean profile,
> but with a clean profile +
> https://addons.mozilla.org/firefox/addon/ublock-origin/ .
> In the attached video (above) you can see that I have uBlock Origin on both
> sides, so it should be irrelevant. I hope this makes it easier for you to
> find the cause.

Oh, that may help me repro, thanks!

Comment 5

[Darkspirit]

In case you wanted to accuse that uncool legacy addon:

(In reply to Darkspirit from comment #2)
> https://addons.mozilla.org/firefox/addon/ublock-origin/
In my clean profile test I used this "real legacy" addon from AMO.

But in the attached video I use a real webextension of ublock origin on both sides:
1. express your displeasure: extensions.legacy.enabled;false + extensions.interposition.enabled;false
2. https://github.com/gorhill/uBlock/releases
3. Download uBlock0.webext.xpi (this is a legacy addon as wrapper for the webextension inside it to migrate settings)
4. unzip it, go into the webextension folder, check all, zip.
5. xpinstall.signatures.required;false + import that zip into about:addons

Comment 6

[Emilio Cobos Álvarez [:emilio]]

This may be the same root cause as bug 1379041, mind re-testing with the next nightly?

Thanks!

Comment 7

[Darkspirit]

(In reply to Emilio Cobos Álvarez [:emilio] from comment #6)
> This may be the same root cause as bug 1379041, mind re-testing with the next nightly?
> 
> Thanks!
You were right, I think.

Nightly 56 x64 20170709100223 @ Debian Testing (Linux 4.9.0-3-amd64, Radeon RX480)
Verified fixed: The orange "Zum Angebot" buttons on https://schnaeppchenfuchs.com don't grow on mouseover anymore.

Comment 8

[Darkspirit]

Verified in comment 7.