When I clicked a link on Gmail, the browser will open my default browser, when I pay more attention to it, I noticed it is the name of my browser but it does not look like my browser. I went to Gmail setting to disable open web link in Gmail. The link start to open on my default browser as usual. I consider that Gmail which name their browser the name of your default browser.
The same thing happened on Telegram, I thought it was Telegram build-in browser but it was disabled. I enable it and I noticed the difference. I disabled it again and the Gmail browser was the default again. Gmail shows it as my default browser name but not my default browser just like when open web link in Gmail was enable on Gmail, but it is now disabled but it is the browser that is opening when I click on link on my Telegram or other apps.
I do not download malware because I know how to avoid them, I do not think this is malware. I have some bitcoin wallets with small amount of bitcoin on the device, I just want to know if my device is safe.
Alright I get that you are having some issues with your mobile browser but not exactly sure what it is.
It would have been much easier to provide a solution if you would have just pasted the screenshots of your issue.
From what I get, there's nothing wrong with your browsers and its just how the default view opens when you click a link from Gmail and Telegram.