2037611 - Replace thinking indicator with action log container

Status: VERIFIED FIXED

(Core :: Machine Learning: Frontend, enhancement)

Description

[Justin Levinsohn]

Attachment: image (13).png

Replace the generic thinking indicator with an action log container that displays tool execution steps.

• During tool execution, show action log instead of static "thinking" state
• Action log displays tool steps in sequence
• Action log is collapsed by default
• Action log can be expanded to show more detail
• Layout is stable (no flashing/jumping during updates)
• Final assistant response renders below action log after completion
• Uses existing NL tabs UI components where possible

See prototype screenshot attached. Will refine UX once under way.

Comment 1

[Yubin Jamora]

Attachment: Bug 2037611 - Add action log container in tool call r?ngrato!

Comment 2

[Justin Levinsohn]

A document of strings per tool call provided by Katie L.

https://docs.google.com/document/d/1vjPVNtEllB43riAMesxK4XnQ8IVyftYsWnLFO_yum0I/edit?tab=t.fwcll1x7p1wo

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/22fdba008db3
https://hg.mozilla.org/integration/autoland/rev/04842189c62c
Add action log container in tool call r=ngrato,mshillabeer

Comment 4

[Sandor Molnar[:smolnar]]

https://hg.mozilla.org/mozilla-central/rev/04842189c62c

Comment 5

[Yubin Jamora]

Attachment: Bug 2037611 - Add action log container in tool call

Original Revision: https://phabricator.services.mozilla.com/D302565

Comment 6

[Pulsebot]

https://github.com/mozilla-firefox/firefox/commit/622746718ce3
https://hg.mozilla.org/releases/mozilla-beta/rev/7cd130e1af18

Comment 7

[Rares Doghi, Desktop QA]

Verified as fixed in our latest Beta 152.0b11 and our latest Nightly 153.0a1 (2026-06-11)