1362296 - Userstyles.org is able to override middle-click behaviour on <a href>

Status: RESOLVED INVALID

(Firefox :: Untriaged, defect)

Description

[Stephan Sokolow]

User Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:37.0) Gecko/20100101 Firefox/37.0
Build ID: 20170329150849

Steps to reproduce:

1. Go to userstyles.org
2. Middle-click "Help" or "Contact" in the footer


Actual results:

The current tab is navigated, despite this being a middle-click on an <a> element with a valid "href". (Indicating a regression to Chrome-like click event-handling behaviour)


Expected results:

The middle-click should have an effect identical to right-clicking and choosing "Open Link in New Tab" and the site should not be able to override this.

Comment 1

[Stephan Sokolow]

Whoops. I just realized that I forgot to manually set my version information to 52 ESR. (I'm using User-Agent randomization to mitigate browser fingerprinting.)

Could someone please correct that?

Comment 2

[Kohei Yoshino [:kohei]]

It's not specific to userstyles.org nor a bug in Firefox; it's possible for websites to override the standard click behaviour. Some sites are tracking link clicks for analytics purposes, and such issues can happen when they don't consider right- or middle-click. Please report the issue to the site.

Comment 3

[Stephan Sokolow]

It's a regression in Firefox.

Firefox didn't used to require sites to handle middle clicks specially in their progressive enhancement code. That was a very noticeable difference from Chrome that I would call attention to and demonstrate.