feat: update Fedora and GNOME guides

Signed-off-by: chris1320 <chris1320is@protonmail.com>

Author: Chris1320

Desktop Environments/GNOME/GNOME.md

@@ -16,7 +16,7 @@ tags:
 
 1. Open *Settings* and do the following:
     - Select **Dark** in `Appearance > Style`.
-    - Go to `Date & Time > Clock & Calendar` and set the following into their assigned values:
+    - Go to `System > Date & Time > Clock & Calendar` and set the following into their assigned values:
         - Week Day: *Disabled*
         - Date: *Disabled*
         - Seconds: *Enabled*

Operating Systems/Fedora Workstation/Fedora Workstation.md

@@ -14,7 +14,7 @@ This is a guide on how I customize my Fedora installation. [Fedora Workstation](
 
 ## Installation
 
-> [!NOTE] This guide is tested on Fedora Workstation 39.
+> [!NOTE] This guide is tested on Fedora Workstation 40, but it should also work on Fedora Workstation 39.
 
 ### Installing Fedora Workstation
 
@@ -33,6 +33,10 @@ This is a guide on how I customize my Fedora installation. [Fedora Workstation](
 4. Restart the machine.
 5. Follow the on-screen instructions.
 
+> [!WARNING]
+> 
+> **Do not** enable third-party repositories when asked.
+
 ### Customization
 
 > [!TIP]
@@ -54,9 +58,10 @@ hostnamectl hostname --static <YOUR_DESIRED_STATIC_HOSTNAME>
 hostnamectl hostname --pretty <YOUR_DESIRED_PRETTY_HOSTNAME>
 ```
 
-#### 2. Configure DNF Package Manager
+#### 2. Configure DNF and Flatpak Package Managers
 
 ```bash
+echo 'defaultyes=True' | sudo tee -a /etc/dnf/dnf.conf
 echo 'max_parallel_downloads=10' | sudo tee -a /etc/dnf/dnf.conf
 echo 'deltarpm=True' | sudo tee -a /etc/dnf/dnf.conf
 # echo 'fastestmirror=True' | sudo tee -a /etc/dnf/dnf.conf
@@ -67,8 +72,20 @@ sudo dnf install https://mirrors.rpmfusion.org/free/fedora/rpmfusion-free-releas
     https://mirrors.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-$(rpm -E %fedora).noarch.rpm
 sudo dnf config-manager --enable fedora-cisco-openh264
 sudo dnf groupupdate core
+
+flatpak remote-add --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo
 ```
 
+> [!TIP]
+> 
+> Verify the results by checking the outputs of the following commands:
+> 
+> ```bash
+> cat /etc/dnf/dnf.conf
+> dnf repolist
+> flatpak remotes
+> ```
+
 #### 3. SSD-Specific Configuration
 
 > See [this article](https://mutschler.dev/linux/fedora-post-install/#btrfs-filesystem-optimizations).
@@ -95,22 +112,40 @@ sudo dnf install openssl \
     git git-lfs wl-clipboard file-roller dmg2img \
     gnome-tweaks gnome-extensions-app \
     blueman-nautilus file-roller-nautilus \
-    gnome-terminal-nautilus nautilus-gsconnect \
+    nautilus-gsconnect \
 
 # multimedia codecs
 sudo dnf swap ffmpeg-free ffmpeg --allowerasing
-sudo dnf install -y gstreamer1-plugins-{bad-\*,good-\*,base} gstreamer1-plugin-openh264 gstreamer1-libav --exclude=gstreamer1-plugins-bad-free-devel
-sudo dnf install -y lame\* --exclude=lame-devel
+sudo dnf install -y @multimedia @sound-and-video \
+	gstreamer1-plugins-{bad-\*,good-\*,base} \
+	gstreamer1-plugin-openh264 mozilla-openh264 \
+	gstreamer1-libav lame\* \
+	--exclude=gstreamer1-plugins-bad-free-devel,lame-devel
 sudo dnf group upgrade --with-optional Multimedia
 
-# firefox multimedia codecs
-sudo dnf config-manager --set-enabled fedora-cisco-openh264
-sudo dnf install -y gstreamer1-plugin-openh264 mozilla-openh264
-
 flatpak install -y flatseal
 ```
 
-#### 6. Customizing GNOME
+#### 6. Replace Firefox Stable with Firefox Nightly
+
+I have been using Firefox Nightly in my Windows machine for more than 4 years to get the latest features and fixes, and I did not have any major problems about it.
+
+```bash
+# Download the archive and extract its contents to /opt/firefox-nightly
+wget -O ~/Downloads/FirefoxNightly.tar.bz2 "https://download.mozilla.org/?product=firefox-nightly-latest-ssl&os=linux64&lang=en-US"
+sudo tar -xf ~/Downloads/FirefoxNightly.tar.bz2 --one-top-level=/opt/firefox-nightly --strip-components=1
+
+# OPTIONAL: remove Firefox data
+rm -rf ~/.mozilla
+
+# run Firefox Nightly once to set it as default browser. You can now also configure it at this point or restore an existing profile backup.
+/opt/firefox-nightly/firefox
+
+# remove Firefox stable
+sudo dnf remove firefox
+```
+
+#### 7. Customizing GNOME
 
 > See the [[GNOME]] customization guide.