Recent Commits to firefox-csshacks:master

Makes the bookmarks toolbar scrollable (#557)

* Makes the bookmarks toolbar scrollable

* Update scrollable_bookmarks_toolbar.css

* Make the bookmarks toolbar scrollable (comment corrections)

overlay tab audio icons: improve the audio icon alignment a bit

hide tabs scrollbuttons: Add fallback --tab-shadow-max-size prop

--tab-shadow-max-size property doesn't exist anymore and thus our margin
computation for the scrollbuttons doesn't work anymore. This patch
fixes #555

standalone images: Don't set auto margin by default

It break zoomed-in images.

multi-row-tabs: Use tabbrowser-tabs as the tab container

This makes tabs scrollboxes have display:contents and thus makes tabs
use tabbrowser-tabs as their parent container.

Reason being that in firefox 141 the pinned tabs are moved to separate
scrollbox which would then have it's own display block.
Fixes #551

iconized menubar items: Update selectors a bit