2057823 - Moving the mouse over search field in Unified Toolbar bar shows default cursor instead of text edit cursor when entering search bar area from the bottom, with macos 12.7.6

Status: RESOLVED INVALID

(Thunderbird :: Toolbars and Tabs, defect)

Description

[Tobias (:Tobbi) Markus]

Attachment: screencast

I just found an interesting bug that's happening on latest nightly as well as latest release. The cursor that gets shown in the central search bar is different depending on where you enter the search bar from. If you enter it from the left, it shows a default text edit cursor. If you enter it from the bottom, it shows a pointer cursor.

Thunderbird version: 155.0a1 (2026-07-23) (64-Bit)

Steps to reproduce:

1. Move the cursor to the left of the central search bar showing in the top center of the Thunderbird window.
2. Move it inside the search bar.
3. Notice how the cursor displayed is text.
4. Move the cursor to the bottom of the central search bar.
5. Move it inside the search bar.

Actual results:
Default cursor is displayed.

Expected results:
Text cursor is displayed.

Comment 1

[Tobias (:Tobbi) Markus]

Attachment: better screencast

Comment 2

[Wayne Mery (:wsmwk)]

FInding the regression range will help.
https://docs.google.com/document/d/1d9uoRxuHyzMKVX4HQSWdKh7XrpE_tBNQ2gap5Q-K3bE/edit?tab=t.0

Comment 3

[Tobias (:Tobbi) Markus]

I can see this in the mozregression log:

2026-07-26T15:44:59.279000: INFO : Narrowed nightly regression window from [2026-06-11, 2026-06-13] (2 days) to [2026-06-11, 2026-06-12] (1 days) (~0 steps left)

Pushlog:
https://hg-edge.mozilla.org/comm-central/pushloghtml?fromchange=eabe2e4b5c24c67b721c2742331c6699f5077178&tochange=9400ab220c46b05ed3f51d9665c48561bc81f4b4

Skimming through the pushlog, I can't really identify a failed commit at first glance.

Comment 4

[Tobias (:Tobbi) Markus]

Seems like I need to bisect on comm-central, not comm-central-l10n. I'm on it.

Comment 5

[Tobias (:Tobbi) Markus]

https://hg-edge.mozilla.org/comm-central/pushloghtml?fromchange=9400ab220c46b05ed3f51d9665c48561bc81f4b4&tochange=5619011fde744a315ff03694d4158cc9f60ca33a

Comment 6

[Max Emig [:maxe]]

Can you please double-check whether 154 and 153 are fine with the exact same profile/settings?

I was not able to find any regression candidate based on your info.

Comment 7

[Tobias (:Tobbi) Markus]

(In reply to Max Emig [:maxe] from comment #6)

Can you please double-check whether 154 and 153 are fine with the exact same profile/settings?

Thunderbird Beta (154b1) displays the same issue, so does Thunderbird 153 (as I wrote in comment 0).

Comment 8

[Max Emig [:maxe]]

(In reply to Tobias (:Tobbi) Markus from comment #7)

(In reply to Max Emig [:maxe] from comment #6)

Can you please double-check whether 154 and 153 are fine with the exact same profile/settings?

Thunderbird Beta (154b1) displays the same issue, so does Thunderbird 153 (as I wrote in comment 0).

Why are you so certain it's a regression then?

Can you name at least one release where it worked? Otherwise I'm going to remove the regression keywords to avoid more wasted time and resources.

It may very well have been wrong since the 90s imo.

Comment 9

[Tobias (:Tobbi) Markus]

Why are you so certain it's a regression then?

From one of the earlier comments, you can see that I'm not the one who set the regression flags.

Can you name at least one release where it worked? Otherwise I'm going to remove the regression keywords to avoid more wasted time and resources.

I'm gonna run mozregression once more, just to be sure.

It may very well have been wrong since the 90s imo.

Doubtful. The first version of Thunderbird was, according to Wikipedia, released in 2003. So, unless your information differs from the one that's publicly available, a release date in the 90's is unlikely.

Comment 10

[Max Emig [:maxe]]

From one of the earlier comments, you can see that I'm not the one who set the regression flags.

I am not entirely sure what happened on Matrix, who came up with the idea that this is a regression, I believe it might not be one.

I'm gonna run mozregression once more, just to be sure.

I ran more advanced tooling and was not able to find anything in recent versions. Any kind of regression check requires a version that is unaffected.

Doubtful. The first version of Thunderbird was, according to Wikipedia, released in 2003. So, unless your information differs from the one that's publicly available, a release date in the 90's is unlikely.

See https://de.wikipedia.org/wiki/Netscape_Communicator, we still have some code from that era as well as incorrect logic that just got ported over.

Comment 11

[Wayne Mery (:wsmwk)]

(In reply to Tobias (:Tobbi) Markus from comment #9)

Why are you so certain it's a regression then?

From one of the earlier comments, you can see that I'm not the one who set the regression flags.

That would be my error - I assumed you implied this was a new issue that didn't previously exist.

Comment 12

[Max Emig [:maxe]]

(In reply to Wayne Mery (:wsmwk) from comment #11)

(In reply to Tobias (:Tobbi) Markus from comment #9)

Why are you so certain it's a regression then?

From one of the earlier comments, you can see that I'm not the one who set the regression flags.

That would be my error - I assumed you implied this was a new issue that didn't previously exist.

Even if it was, what would we do with a regression window for a minor UI bug? It's not like we would back anything out anyway or approach a fix any differently.

No hard feelings involved on my side, I would suggest to move to classification what code path is involved in doing that rather than manifesting a regression. Might also be Firefox/Gecko somehow.

Comment 13

[Max Emig [:maxe]]

Attachment: Bug 2057823 - Show the text cursor over the global search bar. r=#thunderbird-reviewers

Comment 14

[Max Emig [:maxe]]

I determined this is not a regression and built a fix.

Try run if anyone wants to pre-test: https://treeherder.mozilla.org/jobs?repo=try-comm-central&revision=824f3fb2344e42f93e66900efd6dd22a896934b1

Comment 15

[Ed]

FWIW, I can't repro this on release or beta. I get the text edit cursor either way. Win11 Pro 25H2 build 26200.8875.

Comment 16

[Max Emig [:maxe]]

(In reply to Ed from comment #15)

FWIW, I can't repro this on release or beta. I get the text edit cursor either way. Win11 Pro 25H2 build 26200.8875.

Yes, it is not always wrong, only sometimes for some reason. Specifying in CSS can't hurt, though.

Comment 17

[Max Emig [:maxe]]

What other software did you have running at the same time?

Anything that might be manipulating the cursor? Any other noteworthy settings? Which macOS version are you on?

On my macOS 26 with Thunderbird Daily it seems correct out of the box.

Comment 18

[Tobias (:Tobbi) Markus]

(In reply to Max Emig [:maxe] from comment #17)

What other software did you have running at the same time?

I have loads of other stuff running in the background, but I don't think any of those would be manipulating the cursor in such a way, especially since the bug only occurs sometimes and only with that one particular text box.

Anything that might be manipulating the cursor?

Nothing that I can find at first glance.

Any other noteworthy settings?

I don't think so.

Which macOS version are you on?

12.7.6 (21H1320)

On my macOS 26 with Thunderbird Daily it seems correct out of the box.

Comment 19

[Max Emig [:maxe]]

I have loads of other stuff running in the background

How about you try a reboot without preserving windows and see if it reproduces with nothing else open?

Comment 20

[Wayne Mery (:wsmwk)]

(In reply to Max Emig [:maxe] from comment #19)

How about you try a reboot without preserving windows and see if it reproduces with nothing else open?

Sound advice.

Doesn't happen for me on mac 26 with 154 beta

Comment 21

[Tobias (:Tobbi) Markus]

(In reply to Max Emig [:maxe] from comment #19)

I have loads of other stuff running in the background

How about you try a reboot without preserving windows and see if it reproduces with nothing else open?

It still reproduces after a clean restart when just Thunderbird is open.

Comment 22

[Max Emig [:maxe]]

Any more clues? If it works for multiple people here and there is no reason to believe it has anything to do with the code, closing it might be the sanest choice.

Comment 23

[Wayne Mery (:wsmwk)]

Maybe somehow related to the old version of macOS.

Not seen other reports of this. And still can't reproduce.

Comment 24

[Max Emig [:maxe]]

Marking as invalid as neither of us could reproduce and most likely out of our control.