I think Metamask is what you are looking for.
You install it as a plugin for Firefox / Chrome and you need to note down 12 seed words as in other wallets.
These seed words create the same addresses each time.
You can find more information here, and in the help section:
https://metamask.helpscoutdocs.com/article/14-migrating-to-a-new-seed-phraseBe careful when you use old Ethereum addresses with Metamask. You can import them, but if you lose the private key, the seed will not recover them.
As in bitcoins...wallets like electrum or even online wallets like blockchain...we can generate thousands of addresses which belong to a single wallet...
But in ethereum in myetherwallet i see only one address belong to my wallet and no option to generate another address..
Is it possible ?? If yes then how ??