1683296 - Remove XUL equalsize="always" usages

Status: RESOLVED DUPLICATE of bug 1798111

(Toolkit :: UI Widgets, task)

Description

[Tim Nguyen :ntim]

https://searchfox.org/mozilla-central/search?q=equalsize&path=&case=false&regexp=false

There are only 6 usages in XHTML & JS files. This is actually useful, to force an equal width for the child elements. Prevents the child elements from controlling their own width, no matter what's inside (long wrapping text etc.).

The only usages in Firefox are mainly for table style layouts with a table header, to force columns to have the same width. I'm sure this is possible to do with CSS without special platform code.

When enabling layout.css.emulate-moz-box-with-flex, these attributes no longer take effect, and you can see the consequences when checking the usages.

Comment 1

[Henry Wilkes (they/them) [:henry-x]]

I think there may be some overlap between the Thunderbird preferences file-type/action table, and the same table in Firefox, which currently uses equalsize:

https://searchfox.org/mozilla-central/rev/cca1566127a2fcc013e9c09f9d90ed70df2250a4/browser/components/preferences/main.inc.xhtml#383

You can look at how we handled this in Thunderbird, where we also improved the accessibility of the table, and fixed an alignment issue.

https://hg.mozilla.org/comm-central/rev/a0b86bbaaa09
https://phabricator.services.mozilla.com/D111399