Maybe she's a Britannia Petite mix?
She looks a little racy, she has long front legs with what looks like a slight tuck-up. She is hunched over in that picture, but it seems like if she were to sit up, she would have a full-arched body type. She looks a bit "hare like" like Britannias do. If she's over 6 months of age and only weighs 2 pounds, the only breeds I can think of are Netherland Dwarfs and Britannias that weigh that little.
This isn't my rabbit, but I found this picture of one that looks a little like yours.
Everyone else can chime in on whether they think it could be a possibility or not. Maybe I'm missing an important fact that would make it impossible for her to be one?
Sorry the pictures so big. I copied and pasted it so it won't let me adjust the size.