Mozilla is bound to only use the content to help the use navigate, experience and interact with online content as the user has indicated.
> One thing they could do with your financial data is show it to you (least harm).
Yes - this is what the user indicated.
> Another thing is to aggregate it with other's data (medium harm).
And the user has not indicated that this would be a permitted use of the data - thereby revoking the license of the first clause. If the data is used outside of the final clause of the license, that is unlicensed use of data. This would be a material breach of the contract by the corporation. This could open them up to massive legal penalties.
Mozilla is bound to only use the content to help the use navigate, experience and interact with online content as the user has indicated.
> One thing they could do with your financial data is show it to you (least harm).
Yes - this is what the user indicated.
> Another thing is to aggregate it with other's data (medium harm).
And the user has not indicated that this would be a permitted use of the data - thereby revoking the license of the first clause. If the data is used outside of the final clause of the license, that is unlicensed use of data. This would be a material breach of the contract by the corporation. This could open them up to massive legal penalties.