Comment by adrian_b

Your link does not provide any evidence that USA produces any bromine for the semiconductor industry.

Bromine itself is extremely cheap and easy to produce, like silicon.

Nevertheless pure bromine and pure silicon are very expensive and they are produced in few places around the world.

So you may have millions of tons of bromine, but if none of it has the required purity grade you must stop semiconductor device production until you build a purification facility, which requires money, time and know-how.