Two notes on updates: 1) It will break partial updates, which means the first update attempt will fail, and then Firefox will fall back to a full update (large

Two notes on updates: 1) It will break partial updates, which means the first update attempt will fail, and then Firefox will fall back to a full update (larger, slower). 2) After the update is applied, yes - it will remove the tweak (because the enterity of omni.ja will have been replaced).