Our current checks for supported vs unsupported web3 networks informs the local development environment user that they are connected to an unsupported network while using mainnet, but tells them to use mainnet or rinkeby.
Modify both shared.js starting on L498 and legacy/shared.js starting on L475 to display appropriate alternatives for local env users to include testrpc via ganache-cli and rinkeby.
Local

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Heyo @mbeacom is this what you wanted?

@ckhatri Yes. If possible, it should display rinkeby and custom rpc for local development.
Great! @mbeacom I've gone ahead and done a PR. #472
馃檶 Good work on the first bounty, @ckhatri!
@ckhatri Thanks! Reviewing the PR now!
@ckhatri Please Submit Work on the bounty and I will pay it out.
Thanks again and welcome to the community!
@mbeacom I've submitted! I put a gas price of 1 since that's what it suggested. Probably will take a while.
Thanks to y'all for creating this community!
__The funding of 0.015 ETH (13.03 USD) attached to this issue has been approved & issued to @ckhatri.__