Antique or vintage picture frames such a the one in question really have no, per say, “antique” or “collectible” value and unless they are in a really deployable shape, ….. re-purposing them into firewood … makes no “
cents” whatsoever.
People buy picture frames for their own use based on two (2) criteria only, … and that is, … what the picture they have is going to look like when they put it in that frame … and does the frame “conform” to the other decorations in the room in which it is to be hung.
"Old/older" looking pictures should be hung in "old/older" looking frames.