Extension page opens with each browser launch

[srirambv]

Description

Metamask site opens with each browser launch

Steps to Reproduce

1. Install 0.19.54
2. Install metamask extension, ensure https://metamask.io/#how-it-works page is launched in a new tab, keep the tab open
3. Close the browser and restart, a new tab is launched with https://metamask.io/#how-it-works along with the existing one from step 2

Actual result:

Metamask site opens with each browser launch

Expected result:
Should only launch when the extension is enabled

Reproduces how often: [What percentage of the time does it reproduce?]
100%

Brave Version

about:brave info:

Brave	0.19.54
rev	7ce342d
Muon	4.4.29

Reproducible on current live release:

Yes

Additional Information

[aekeus]

Confirmed on osx

[eljuno]

I think it's not limited to MetaMask? I have Honey installed and it open honey page every startup.
Same from community https://community.brave.com/t/honey-extension-keeps-showing-installation-success-webpage-after-i-open-brave/9291?u=eljuno

And this one, user reported for bitwarden https://twitter.com/exeo5/status/920785451560009728

[maurelian]

Also seeing this with both metamask and honey. I disabled honey due to this.
No such effect is seen with pocket or 1pass.

[eljuno]

+1 from community https://community.brave.com/t/issues-with-extention-plugins/9438?u=eljuno

[eljuno]

+1 from community https://community.brave.com/t/metamask-opens-welcome-tab-every-time-the-browser-is-opened/9539?u=eljuno

[kjozwiak]

Verified by checking both metamask & Honey using the STR mentioned in the original comment #11578 (comment)