For some reason, even though i've linked up TrenchBroom to the Quake 1 folder, there are no textures, period. The entity files are all there, though. When I go to give a face a texture, the browser window is just straight up blank. Why is this? What do I need to do to fix this?
You need to add the wad files in before you can use them. Go to Edit -> Map Properties... and click the + button to add them in.
If you have general questions on the use of Trenchbroom, please use this thread to ask them: http://celephais.net/board/view_thread.php?id=60908
This is for bug reporting and tracking.
Thanks!
Don't use Trenchbroom it can't load Q1 textures and doesn't seem to work right :( use Worldcraft instead, it's old but it gets the job done
What issues are you having loading textures? Perhaps I can help.

Cause it definitely loads Quake wads.
i don't see map properties anywhere.
You should ask for help over here: http://celephais.net/board/view_thread.php?id=60908&start=2788
Github is for bugs and feature requests, but not for user support questions.
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What issues are you having loading textures? Perhaps I can help.

Cause it definitely loads Quake wads.