2016702 - The Assistant remains stuck in infinite loading after a request is made from a quick prompt in a continued conversation

Status: VERIFIED FIXED

(Core :: Machine Learning: Frontend, defect, P1)

Description

[Rares Doghi, Desktop QA]

Attachment: Retry.mp4

Found in

• Nightly 149.0a1 (2026-02-13)

Affected versions

• Nightly 149.0a1 (2026-02-13)

Affected platforms

• all

Steps to reproduce

1. Open the Smart Window.
2. Ask the Assistant about abiogenesis.
3. Click the Google search provided by the assistant and carry the conversation.
4. Ask if there are any images.
5. Click the Quick prompts thats show the process or the miller-urey experiment.

Expected result

• The Assistant should provide the information or a link to some images.

Actual result

• Clicking the Quick prompt will have the Assistant stuck in infinite loading.

Please note that Im also getting this Console error:
run_search: Original tab no longer exists, aborting search handoff to avoid interfering with existing conversation Chat.sys.mjs:202:23
fetchWithHistory moz-src:///browser/components/aiwindow/models/Chat.sys.mjs:202

Regression range
N/A

Comment 1

[Rares Doghi, Desktop QA]

After further testing this seems to happen every time we continue the conversation from the Homepage into the Sidebar. It is no related to the Quick prompts.

1. Type Ps5 games in the Home page smart bar and select Search.
2. Open the Sidebar and ask the Assistant about ps5 top 10 games.

The assistant gets stuck in infinite loading.

Comment 2

[Ed Lee :Mardak]

console.error: "run_search: Associated window not available or closed, aborting search handoff"

Comment 3

[Ed Lee :Mardak]

looks like bug 2012830 did a bad merge conflict resolution changing the context back to win instead of bug 2014802's browsingContext

Comment 4

[BugBot [:suhaib / :marco/ :calixte]]

:bjohns, since you are the author of the regressor, bug 2012830, could you take a look?

For more information, please visit BugBot documentation.

Comment 5

[Ed Lee :Mardak]

looks like bug 2014802 might have introduced some logic issue with checking the browsing context post tool call

Comment 6

[Ed Lee :Mardak]

Attachment: Bug 2016702 - The Assistant remains stuck in infinite loading after a request is made from a quick prompt in a continued conversation r=ngrato!

correctly resolve merge conflict between D280868 and D282505 with context object, use pre-tool-call browsing context for post-tool-call checks

Comment 7

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/ae047b8aa293
https://hg.mozilla.org/integration/autoland/rev/57708731d14a
The Assistant remains stuck in infinite loading after a request is made from a quick prompt in a continued conversation r=ngrato,ai-frontend-reviewers,ai-models-reviewers,bjohns

Comment 8

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/89bd645fa520
https://hg.mozilla.org/integration/autoland/rev/fc76f7f32260
Revert "Bug 2016702 - The Assistant remains stuck in infinite loading after a request is made from a quick prompt in a continued conversation r=ngrato,ai-frontend-reviewers,ai-models-reviewers,bjohns" for causing mochitests failures @browser_smartwindow_run_search.js

Comment 9

[pstanciu]

Backed out for causing mochitests failures @browser_smartwindow_run_search.js

• https://hg.mozilla.org/integration/autoland/rev/fc76f7f32260a80aa9473d6f1d0539157f05dc13
• Push with failures
• Failure Log

Comment 10

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/91b534bed115
https://hg.mozilla.org/integration/autoland/rev/82aeef567263
The Assistant remains stuck in infinite loading after a request is made from a quick prompt in a continued conversation r=ngrato,ai-frontend-reviewers,ai-models-reviewers,bjohns

Comment 11

[Cristian Tuns]

https://hg.mozilla.org/mozilla-central/rev/82aeef567263

Comment 12

[Rares Doghi, Desktop QA]

This issue is verified as fixed in our latest 149 and Nightly 150.0a1 (2026-02-24)