Recent Commits to firefox-csshacks:master

autohide sidebar: Move some of the custom variables under #browser

This allows us to use them targeting #sidebar-container as well

Add sidebar_buttons_above_sidebar.css

non floating tabs: Override the background for default non-system theme

non floating sharp tabs: set --split-view-padding-block: 0

We already behave as if the value would be 0, and actually setting
the variable to 0 makes things like tab-separator-lines scale correctly

tab separator lines: Show separator at front of split-container having multiselected tab

Fixes #680

tab separator lines: Add back the header that had accidentally been removed

prefer non-camelcase --urlbarview variable names

This was changed in fx 159

autohide main toolbar: handle various scenarios of toolbars being transparent

This patch also adds a hoverable area above toolbars if vertical tabs
are used, except if menubar is enabled.

autohide bookmarks toolbar: Fix toolbar background when default theme is used

This patch also makes the multi-row-bookmarks compatibility rules
use -moz-pref instead of having to uncomment rules

urlbar container color border: limit some rules to only apply with [breakout]

We don't want padding etc. to apply when new urlbar structure is used.
These effectively make padding etc. only apply to pre-157 versions.

add tags for urlbar_fitts_flat_top.css

URL/search bars with unpadded, flat tops. (#674)

This is Fitts's law compliant if the horizontal tab bar is hidden.

urlbar-results in two rows: text-overflow long urls and titles

Rewrite gradient tab borders to use background-clip: border-area when available

autohide bookmarks toolbar: use lh length unit as a basis for toolbar height

urlbar results in two rows: use new selectors to match row structure

compact urlbar megabar: apply fixes for newly structured urlbar

compact addons manager: fix new page navigation section

add separate_sidebar_and_content_blocks.css