With my new phone (Android v16 I think), I opened the browser one day and realized there were a bunch of open tabs. What's happening now is that when you close the browser, open tabs don't close - unless you change the settings to make them close when you close the browser. It's obvious on a computer because you see the tabs that you don't see on the phone. I use Brave which is a variant of Chrome, and have never found a setting on the phone that says something like "close open tabs on exit"; the computer has several options for dealing with open tabs on exit.
In the Brave version on the phone at the bottom of the browser there's a square with a number displaying how many tabs are currently open - at least in Brave and on this phone. If you tap there, it shows open tabs and at the bottom the three stacked dots for menu options. Press on that and it opens up options to open new tabs (probably not your friend) and one that says "Close all tabs"; much easier than deleting several hundred or thousand tabs individually.
What I didn't realize was that the news feed was opening stories in Brave (probably Chrome on most Android devices), so I knew it kept opening tabs. Programmers keep changing stuff - you get used to things one way and some Gen Whatever comes along and it's a new day on how stuff works. I liked the good old days when things were hardware and kids couldn't diddle with how it worked. Of course, hardware option opens the door for ND40 to have to find new ways to operate with fewer available digits. Just remember the kiddies who mess with your tech probably have no idea how to do something simple and important like change a tire.