Tab number is wrongly counted on 'opens a new tab with the location of the entry when double clicked' test

[luixxiul]

Description

npm run test -- --grep='about:bookmarks double click behavior opens a new tab with the location of the entry when double clicked' fails due to that the tab number is wrongly counted.

Steps to Reproduce

1. Run BRAVE_TEST_COMMAND_LOGS=1 npm run test -- --grep='about:bookmarks double click behavior opens a new tab with the location of the entry when double clicked'

Reproduces how often: [What percentage of the time does it reproduce?]
Consistently

Brave Version

about:brave info:

Brave: 0.21.0
V8: 6.1.534.41
rev: e357db4
Muon: 4.4.25
OS Release: 16.7.0
Update Channel: Release
OS Architecture: x64
OS Platform: macOS
Node.js: 7.9.0
Brave Sync: v1.3.5
libchromiumcontent: 61.0.3163.100

Reproducible on current live release:

Additional Information

[luixxiul]

This looks failing only on master.

master: https://travis-ci.org/brave/browser-laptop/jobs/282118449#L3646
0.20.x: https://travis-ci.org/brave/browser-laptop/jobs/282118734#L3695 (other tests are failing)
0.19.x: https://travis-ci.org/brave/browser-laptop/jobs/282119235#L3774 (other tests are failing)

[luixxiul]

@cezaraugusto do you think this issue has a similar cause as #11269?