When opening a PDF on Desktop, sometimes tab doesn't show in tab list

[bsclifton]

Description

When Brave is setup to handle/open PDFs by default, I noticed that opening a PDF did not show the open tab in the list of tabs.

The tabs don't seem to refresh after opening the PDF. If you click New Tab, then it'll force an update where the tab shows (along with an empty NTP).

Possibly caused by brave/brave-core#27431 - this PR is preventing unnecessary re-renders of the tabs area. But it could be contributing to this bug.

cc: @simonhong

Steps to reproduce

1. Have vertical tabs enabled
2. Have Brave open
3. Have Brave setup to open PDF files. For example, if you double click a PDF in Windows, it should open in Brave (default application for PDF). After setting, you may need to restart.
4. Double click a PDF on your desktop

Actual result

The document always seems to open.

However, sometimes it doesn't show the open tab in the list of tabs. For example, if I open "clifton.pdf" I'll see the document open but I won't see "clifton.pdf" in any of the open tabs.

If you click New Tab, then it seems to force a refresh - then the "clifton.pdf" and a blank new tab will be open.

Expected result

Tab should always show

Reproduces how often

Intermittent issue

Brave version (brave://version info)

Brave		1.77.10 Chromium: 133.0.6943.39 (Official Build) nightly (64-bit) 
Revision	2f0a7f93d99c180ce71ddde77743ab6652afd8b5
OS		Windows 11 Version 24H2 (Build 26100.2894)

Channel information

• release (stable)
• beta
• nightly

Reproducibility

• with Brave Shields disabled
• with Brave Rewards disabled
• in the latest version of Chrome

Miscellaneous information

No response

[MadhaviSeelam]

Could not reproduce the issue in

Brave | 1.77.10 Chromium: 133.0.6943.39 (Official Build) nightly (64-bit)
-- | --
Revision | 2f0a7f93d99c180ce71ddde77743ab6652afd8b5
OS | Windows 11 Version 24H2 (Build 26100.2894)

2025-02-03_11h07_23.mp4

[GeetaSarvadnya]

Reproduced the issue on

Brave | 1.77.10 Chromium: 133.0.6943.39 (Official Build) nightly (64-bit)
-- | --
Revision | 2f0a7f93d99c180ce71ddde77743ab6652afd8b5
OS | Windows 10 Version 22H2 (Build 19045.5371)

https://bravesoftware.slack.com/archives/C7VLGSR55/p1738654220480319?thread_ts=1738604208.926639&cid=C7VLGSR55

[GeetaSarvadnya]

Looks like issue is fixed and working fine. I am unable to reproduce the issue on the following build.

Brave | 1.77.14 Chromium: 133.0.6943.39 (Official Build) nightly (64-bit)
-- | --
Revision | 7ee065e7645b34232a63b7d3ee5cd2a4287cc72e
OS | Windows 10 Version 22H2 (Build 19045.5440)

[bsclifton]

Seems like it has been solved with brave/brave-core#27477

[bsclifton]

Quick note - when I had the issue, it wasn't limited exclusively to PDF.
When I opened a web link inside of the Slack application (not PWA), the tab opened basically didn't show in tabs bar.

Since upgrading to 1.77.16, I too have not seen this yet 😄

[kjozwiak]

The above requires 1.75.175 or higher for 1.75.x verification 👍

[GeetaSarvadnya]

Verification PASSED on

Brave | 1.75.175 Chromium: 133.0.6943.54 (Official Build) (64-bit)
-- | --
Revision | 8e82be95a27b2e442e0099307c0c8ad6d12adcf0
OS | Windows 10 Version 22H2 (Build 19045.5440)

Verified the STR from the description and ensured that the issue is fixed and working fine.