Thomas Wisniewski

Modernizr.hiddenscroll does not work propertly for sites specifying custom scrollbar CSS

1

If a site is using a rule like `::-webkit-scrollbar { width: 5px; }`, then Chrome Mobile yields different `offsetWidth` and `clientWidth` values for the test-div that Modernizr is using, regardless...

Why does headers-normalize-response.htm expect null bytes to be allowed?

21

Per spec (first line is from the XHR spec; others are from Fetch spec which it links to): >A request has an associated header list (a header list). Unless stated...

Considering supporting Fenix-style font inflation.

3

Sites appear to have tiny fonts on Focus (like Fennec), but unlike Fenix as of https://github.com/mozilla-mobile/fenix/issues/4458 Users are reporting this as a difference with how Chrome renders pages, as per...

Vague console error when clicking 'X' buttons to close the screenshots UI (webextension version).

1

While clicking the 'X' cancel buttons on the webextension version of screenshots, I see this error logged in the browser console: ``` TypeError: window is null; can't access its "parent"...

Chrome is more lax than Firefox with XSL errors.

1

Firefox is more strict than Chrome about XSL errors, and it's unclear to me if that is something we wish to act upon. For instance, Firefox throws an error when...

Consider falling back on setAttribute when HTMLMetaElement.prototype.media doesn't exist

2

Hello from the web compatiblity team at Mozilla, and thank you for your hard work! While diagnosing [this webcompat.com report](https://github.com/webcompat/web-bugs/issues/105186), I noticed that in issue #30, code was added to...

Change the Firefox version of the addon to simply enable the built-in addon.

3

Desktop and Android Firefox ship with a more feature-rich copy of the webcompat reporter, though it is disabled by default on release builds. As such we could simply have this...

Web platform tests disagree on how to handle blob content-type validation

14

### What is the issue with the MIME Sniffing Standard? While trying to pass all of [mimesniff/mime-types/parsing.any.html](https://wpt.fyi/results/mimesniff/mime-types/parsing.any.html) in Firefox, I've noticed that as I start passing more of the tests...