Platform/Layout/Backlog

How We Track Our Backlog

All tracking of backlog and work-in-progress items happens in Bugzilla. We use the [layout:backlog] tag in the whiteboard field on bugs, tasks and enhancements to track work items that are either under active development, or being considered for development within the next year or so.

We use bug priorities to indicate how soon we plan to work on a bug, task or enhancement according to the following classifications (also documented in our Firefox-wide priority definitions):

• P1 — "Must have/fix." Under active development, or planned development during the current release cycle.
• P2 — "Should have/fix." Near-term backlog item, can/will be worked on starting in the next release cycle or the one after that.
• P3 — "Would like to have/fix." Longer-term backlog item, planned to work on within the next year (assuming the bug also has the [layout:backlog] whiteboard tag).
• P4 — N/A
• P5 — "Will not fix." No plans to work on this item, but will accept contributor patches.

Definition of Assigned

A bug is considered "assigned" if it has both an assignee AND its status is set to ASSIGNED. Having only one of these fields set is not sufficient for it to be tracked as an assigned bug.

Commonly-Used Backlog Queries

• All P1-P3 Backlog Items
• All P1 Backlog Items
• All P2 Backlog Items
• All P3 Backlog Items

Kanban View

For quick reference, view our backlog as a kanban board.

Backlog by Category

In Progress

Bugs, tasks, and enhancements that are in progress right now. This list includes any bug, task or enhancement that is assigned and has the [layout:backlog] whiteboard tag.

No results.

0 Total; 0 Open (0%); 0 Resolved (0%); 0 Verified (0%);

Needs Owner

Bugs, tasks, and enhancements that should be in progress, but currently do not have an assignee. This list includes unassigned P1 tasks, enhancements, and bugs with the [layout:backlog] whiteboard tag.

Full Query

ID	Summary	Assigned to	Status	Resolution
939897	[meta] Support shifting / splitting flex items between continuations of a fragmented flex container (flexbox content truncated when printing)		NEW

1 Total; 1 Open (100%); 0 Resolved (0%); 0 Verified (0%);

Upcoming

Bugs, tasks, and enhancements we are considering working on within the next 2-3 releases. This list includes unassigned P2 tasks, enhancements, and bugs with the [layout:backlog] whiteboard tag.

Full Query

ID	Summary	Assigned to	Status	Resolution
945187	Add support for "pointer-events: bounding-box"		NEW
1480477	Removing DOM children where positional pseudo-classes are involved is really slow.		NEW
1519756	srcset is ignored in some cases		NEW
1619465	Run clip-path animations on the compositor		NEW
1666937	Lazily add mDNS/Bonjour/Avahi printers to the print UI on CUPS platforms (missing printers)		NEW

5 Total; 5 Open (100%); 0 Resolved (0%); 0 Verified (0%);

Backlog

Bugs and enhancements we are considering working on within the year. This list includes all unassigned P3 tasks, enhancements, and bugs with the [layout:backlog] whiteboard tag.

Full Query

ID	Summary	Assigned to	Status	Resolution
255139	Reflow absolute children of relative positioned inlines during nsLineLayout::RelativePositionFrames		NEW
683043	reimplement forced page breaks (page-break-before / page-break-after) (kill nsPageBreakFrame)		NEW
1223880	Implement initial-letter (from CSS Inline Layout Module Level 3)		NEW
1320435	don't reflow during paint suppression	Timothy Nikkel (:tnikkel)	NEW
1446011	Make getCTM and getScreenCTM compatible with other browsers		NEW
1476154	Investigate performance improvements for the frame constructor		NEW
1507516	HTML select cut off on non-retina monitors using retina Macs		UNCONFIRMED
1527329	Print preview - text not rendered properly if not loaded fully		NEW
1527899	above-the-fold animations in scrollport (of e.g. 'height') can cause visible elements to jitter when the scroll position is clamped		NEW
1531781	borders and sticky position don't work in border-collapsed table head		NEW
1547859	Let dynamic reflow roots ride the trains to release		NEW
1567584	Lack of interop regarding visual styling of text-decoration		NEW
1594249	implement -webkit-tap-highlight-color		NEW
1602669	Convert nscoord into a struct / class		NEW
1622947	input type="number" with datalist, repeat up/down keys increases or decreases values only once		NEW
1623425	transform translateX animation with requestAnimationFrame is jittery		NEW
1627386	[meta] Windows 10 layout, CSS and SVG reftest failures		NEW
1633936	Add telemetry to determine how much content is clipped during printing		NEW
1646895	{inc} Inline content in a box centred with auto margins next to a float reflows erratically on browser window resize		NEW
1663634	Firefox doesn't handle body with height 100vh properly with overflow:hidden on the root element		REOPENED
1670705	[css-text] 'overflow-wrap: anywhere' should break between unbreakable inlines		NEW

21 Total; 21 Open (100%); 0 Resolved (0%); 0 Verified (0%);

Recently Fixed in Nightly

Bugs, tasks, and enhancements that have landed in the current nightly.

Full Query

ID	Summary	Assigned to	Status	Resolution
1639816	Printing local pages via Print Menu fails with In Printing:Print:Done handler, got unexpected rv 2147746065	Jonathan Watt [:jwatt]	VERIFIED	FIXED

1 Total; 0 Open (0%); 0 Resolved (0%); 1 Verified (100%);

Recently Fixed in Beta

Bugs, tasks, and enhancements that have landed in the current beta.

Full Query

ID	Summary	Assigned to	Status	Resolution
1584890	abspos root element (html) ignores top/right/bottom/left properties, if it has "display:flex" or "display:grid"	Ting-Yu Lin [:TYLin] (PDT, UTC-7)	RESOLVED	FIXED
1622935	Support pushing and splitting flex items for single-line (and some multi-line) flex container	Ting-Yu Lin [:TYLin] (PDT, UTC-7)	RESOLVED	FIXED
1626129	Height computation for (nested?) box is somewhat different in printing	Ting-Yu Lin [:TYLin] (PDT, UTC-7)	RESOLVED	FIXED
1564128	Unable to print CSS animations/transitions and web animations	Emily McDonough [:alaskanemily]	RESOLVED	FIXED

4 Total; 0 Open (0%); 4 Resolved (100%); 0 Verified (0%);