Those browser based wallets are more common in ethereum because there are no good desktop Wallets for ethereum. Have you ever seen one?
On the other hand bitcoin has a lot of good desktop wallets.
Oh my bad, I thought we are in the Bitcoin section, no the altcoin discussion
Those browser based are like desktop wallets. They are safer because there is xentral server which can be hacked to steal your coins : the hacker would need to hack your computer.
Nope, the hacker needs to infect your browser.
And if you plan on having a separate browser for every coin to keep secure, why not stick to a traditional wallet?
Oh, wait, because the shitcoin doesn't have a proper wallet...
In my opinion, the choice is pretty simple, I can invest in some gold that I can keep in a safe, or I can invest in some platinum that I must hide under my doormat.
Let's not even talk about the deadly combination of a web browser and pornhub..