Simply install this extension for Google Chrome or Brave Browser works on both

https://chrome.google.com/webstore/detail/steem-keychain/lkcjlnjfpbikmcmbachjpdbijejflpcm?hl=en

This is an extension... when you have it installed in your browser you just click on the little Blue Keys in top right corner of your browser,

When you first see Keychain it will ask you to CREATE a password for logging in, (NOT your keys, you enter those letter by clicking the settings button, the four squares in the top right

and now the keychain app will pop up and you enter your active and posting keys and then you have a wallet built in to your browser for steem dapps like steemit steem-engine etc (Sorry the firefox addon page was taken down last i checked but im sure Hive account@yabapmatt can explain where to get if youre using Firefox)