Tapping more sources opens first source link

[ProjectMoon]

Describe the bug
Tapping the more sources button on mobile opens the first source link in a new tab, while also opening the sources list on the Perplexideez tabn.

To Reproduce
Steps to reproduce the behavior:

1. Do a search on mobile.
2. Tap sources list button at the top.

Expected behavior
Sources box opens, and not the first source in a new tab.

Smartphone (please complete the following information):

• Device: Pixel 7 Pro
• OS: Android 15
• Browser Firefox
• Version 132

Additional context
Happens on both Firefox and chromium mobile for me.

[ProjectMoon]

Also of note: does not seem to happen on Firefox desktop when the page is set to emulate a mobile browser in dev tools.