All this trouble just for cookies? 
have any of you seen where by a crypto wallet of android phone got hijacked through cookies or what? Android phones the most secure when it comes to crypto wallets, they are less vulnerable to attacks unlike PC and iPhone
have any of you seen where by a crypto wallet of android phone got hijacked through cookies or what? Android phones the most secure when it comes to crypto wallets, they are less vulnerable to attacks unlike PC and iPhoneAlthough this is old news, the fact that you are asking whether it was ever or not, you can read that android hacks have been and will be.
https://newdaycrypto.com/promon-hackers-use-android-vulnerability-to-access-cryptocurrency-wallets/
For your safety and peace of mind, you can regularly, without unnecessary extensions, delete cookies. Of course, this causes inconvenience that next time you have to re-enter your username and password, but by deleting cookies, we can thus prevent hackers from finding out our data.
Here's another story when two malware was stealing a cookie on an android.
https://www.newsgram.com/researchers-discover-android-malware-steal-cookies-social-media-sites/