German Let's Player / Streamer. 🕹️GNU/Linux🐧& Fediverse 🦣🐁 📷 🔁 Enthusiast. Break the Windows and Gates. There is a bad Face behind the Musk.
To name a few: AssaultCube, Battle for Wesnoth, Cube2: Sauerbraten, FligthGear, Freeciv, Freeciv21, Nexuiz Classic, OpenArena, OpenHV, OpenRA, OpenTTD, Remnants of the Precursors, SpeeDreams, Stone Kingdom, SuperTux, SuperTuxKart, Unciv, Urban Terror, Veloren, Warozone 2100, Widelands, Xonotic
P.S. It may be that not all of them are FOSS, but they run natively on linux.
You could use an RSS reader app and add a .rss to the end of a Mastodon URL. It works for individual accounts, hashtags, and instances.
Here is also a website where you can see if there is an open source port to non-open source games or an alternative that e.g. tries something of its own / based on the gameplay. As an example, the following "clones" are listed for Minecraft: Minetest, Mineclone2 (now VoxeLibre), ManicDigger and more.
Edit: fixed some grammatic fails.
I have the tag function as in the picture in 132. Do you use any add-ons that have something to do with bookmarks? I couldn't find an option that affects this either. Not even in about:config.
I found 3 solutions, all of which have the same solution. You should enter a bookmark tag in the Bookmarks Manager so that this appears. It's probably a bug since Firefox 116. Solution 1, Solution 2, Solution 3.
Now it remains to be seen whether it will work for you.
Edit: Have linked solutions.
If the problem doesn't come from an add-on, it's best to download Firefox from the Mozilla server for your system in your language and see if it's there. This version is then shielded from the other Firefox installation and is like a new installation of Firefox. Also you can then narrow down the problem and see if there is a problem with your current Firefox installation or if it is due to something else.
The Half-Life Games.