In the ui modules there are no really successor of widget

[xabolcs]

The issue to address widget deprecation is landed (#183), but sdk/ui/toolbar + sdk/ui/frame is not the same as sdk/widget.

This issue is for researching (and developing) alternatives to reborn widget.

widget ...:

• has a wide UI, with all the information
• can be moved across toolbars
• doesn't play well with the menu (see Allow to access the MemChaser data via a button in the main toolbar instead of its own toolbar #176), should be fixed
• has a fixed width, should have dynamic width

Cc @whimboo.

[xabolcs]

One approach is to write a restartless addon without Addon SDK, other one could be a new SDK library, that uses CustomizableUI.jsm directly to build an toolbaritem.

[whimboo]

I would totally vote for something without the SDK then. Right now it's more an annoyance than it is helpful to create shiny looking add-ons. Especially with all the customizations you have to do yourself.

[xabolcs]

I don't want to drop Addon SDK at first step, it has nice testing framework.
I would start with the new Jetpack library, what I wrote about a month ago.