Update firejail-welcome.sh

typos, spelling and other fixes. thanks @reinerh for all these

contrib/firejail-welcome.sh

@@ -1,9 +1,18 @@
 #!/bin/bash
 
 # This file is part of Firejail project
-# Copyright (C) 2014-2020 Firejail Authors
+# Copyright (C) 2020 Firejail Authors
 # License GPL v2
 
+if ! command -v zenity >/dev/null; then
+ echo "Please install zenity."
+ exit 1
+fi
+if ! command -v sudo >/dev/null; then
+ echo "Please install sudo."
+ exit 1
+fi
+
 export LANG=en_US.UTF8
 
 zenity --title=firejail-welcome.sh --text-info --width=750 --height=500 <<EOM
@@ -12,22 +21,22 @@ Welcome to firejail!
 This is a quick setup guide for newbies.
 
 Profiles for programs can be found in /etc/firejail. Own customizations should go in a file named
-<proile-name>.local in ~/.config/firejal.
+<profile-name>.local in ~/.config/firejal.
 
-Firejails own configuration can be found at /etc/firejail/firejail.config.
+Firejail's own configuration can be found at /etc/firejail/firejail.config.
 
 Please note that running this script a second time can set new options, but does not unset options
 set in a previous run.
 
-Webiste: https://firejail.wordpress.com
+Website: https://firejail.wordpress.com
 Bug-Tracker: https://github.com/netblue30/firejail/issues
 Documentation:
 - https://github.com/netblue30/firejail/wiki
 - https://github.com/netblue30/firejail/wiki/Frequently-Asked-Questions
 - https://firejail.wordpress.com/documentation-2
 - man:firejail(1) and man:firejail-profile(5)
 
-PS: If you have any improvements for this script, open a issues or pull request.
+PS: If you have any improvements for this script, open an issue or pull request.
 EOM
 [[ $? -eq 1 ]] && exit 0
 
@@ -40,26 +49,26 @@ EOM
 read -r -d $'\0' MSG_Q_BROWSER_ALLOW_DRM <<EOM
 <big><b>Should browsers be able to play DRM content?</b></big>
 
-\$HOME is noexec,nodev,nosuid by default for the most sandboxes. This means that executing ELFs which are located in \$HOME,
+\$HOME is noexec,nodev,nosuid by default for the most sandboxes. This means that executing programs which are located in \$HOME,
 is forbidden, the setuid attribute on files is ignored and device files inside \$HOME don't work. Browsers install proprietary
 DRM plug-ins such as Widevine under \$HOME by default. In order to use them, \$HOME must be mounted exec inside the sandbox to
-allow there execution. Clearly, this may help an attacker to start malicious code.
+allow their execution. Clearly, this may help an attacker to start malicious code.
 
-NOTE: Other software written in an interpreter language such as bash, python or java can always started from \$HOME.
+NOTE: Other software written in an interpreter language such as bash, python or java can always be started from \$HOME.
 
-TIPP: If <tt>/home</tt> has its own partition, you can mount it <tt>nodev,nosuid</tt> for all programs.
+HINT: If <tt>/home</tt> has its own partition, you can mount it <tt>nodev,nosuid</tt> for all programs.
 EOM
 
 read -r -d $'\0' MSG_L_ADVANCED_OPTIONS <<EOM
 You maybe want to set some of these advanced options.
 EOM
 
 read -r -d $'\0' MSG_Q_RUN_FIRECFG <<EOM
-<big><b>Should the most programs started in firejail by default?</b></big>
+<big><b>Should most programs be started in firejail by default?</b></big>
 EOM
 
 read -r -d $'\0' MSG_I_ROOT_REQUIRED <<EOM
-In order to apply these changes, root right are required.
+In order to apply these changes, root privileges are required.
 You will now be asked to enter your password.
 EOM