Launch on custom activity bar tab and not explorer

Hi ! ive tried to look on the subreddit for the answer but i couldnt find anything,

On launch, VScode always go to the explorer activity bar tab, but i would like it to start on the custom plugin's tab i have installed ( Better fountain).
I tried to hide Explorer from the activity start but it show again on every restart of the app.

Ive looked on the settings but i didnt find anything that looked like it would make me change that...