Script to automatically update firefox since it's not great at doing

this on it's own

update-firefox.pl

@@ -0,0 +1,154 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+use IO::Prompter;
+use File::Which qw( which );
+
+# Configurable variables
+my $lang = 'en-CA';
+my $install = "$ENV{HOME}/.local/bin";
+my $working = "/tmp/firefox.new";
+
+# Download link as provided by https://www.mozilla.org/$lang/firefox/developer/
+my $url = 'https://download.mozilla.org/?product=firefox-devedition-latest-ssl&os=linux64&lang='.$lang;
+
+# Ensure that we can unzip
+unless (which("bunzip2")) {
+    die "Requires bunzip2. Try:\nsudo apt install zutils or your distro's equivalent\n";
+}
+
+# Only understood argument is to not bother verifying the package
+my ($download_key, $verify) = (0,1);
+if (defined $ARGV[0]) {
+    if ($ARGV[0] eq '--no-verify') {
+        $verify = 0;
+    } else {
+        die "Didn't understand argument $ARGV[0]\n";
+    }
+}
+
+# If verification is to be done, make sure we have the key
+unless ($verify) {
+    print "Checking for Mozilla GPG key in keyring...\n";
+    system("gpg --list-keys release\@mozillla.com 2>&1 > /dev/null");
+    if ($?) {
+        my $YN = prompt (-in => *STDIN, "You don't currently have Mozilla's GPG key in your keyring.\nWould you like to install it? If not, installation will not be verified. [y/N]: ", -single);
+        if ($YN eq 'y' || $YN eq 'Y') {
+            $download_key = 1;
+        } else {
+            $verify = 0;
+        }
+    }
+}
+
+# If a previous download still exists remove it
+if ( -e $working ) {
+    system("rm -rf $working");
+    if ($?) {
+        die "Working directory $working already exists and failed to remove: $!\n";
+    }
+}
+
+# Get version currently installed
+my $current = `$install/firefox/firefox-bin --version`;
+$current =~ s/.*\s([^\s])/$1/;
+chomp $current;
+
+use WWW::Mechanize;
+my $mech = WWW::Mechanize->new();
+
+# $url is actually going to redirect to the proper current dowload, so just get the redirect.
+my $head = $mech->head($url);
+
+my ($location, $version);
+# This redirect will have the version id, so we can use that to determine if a new version actually exists
+if ($head->{'_msg'}) {
+    $version = $location = $head->{'_previous'}->{'_headers'}->{'location'};
+    $version =~ s/^.*\-([^\-]*)\.tar\.bz2$/$1/;
+    if ($version eq $current) {
+        die "Current ($current) is the same as New ($version)\n";
+    }
+} else {
+    print "unable to find new download\n";
+}
+
+mkdir($working) || die "Couldn't make $working: $!\n";
+
+# Download package
+print "Fetching package $location...\n";
+$mech->get($location);
+$mech->save_content( $working."/firefox-".$version.".tar.bz2", binmode => ':raw', decoded_by_headers => 1 );
+
+# If verification is required, get signature as well
+if ($verify) {
+    $location .= '.asc';
+    print "Fetching GPG signature $location...\n";
+    $mech->get($location);
+    $mech->save_content( $working."/firefox-".$version.".tar.bz2.asc", binmode => ':raw', decoded_by_headers => 1 );
+}
+
+# If key still needs to be fetched, get it
+if ($download_key) {
+    $location =~ s/linux-x86_64.*$/KEY/;
+    print "Fetching GPG key $location...\n";
+    $mech->get($location);
+    $mech->save_content( $working."/mozilla.pgp", binmode => ':raw', decoded_by_headers => 1 );
+    # And install it
+    print "Installing Mozilla GPG key in keyring...\n";
+    system("gpg --import $working/mozilla.pgp 2>&1 > /dev/null");
+    if ($?) {
+        die "Warning: failed to import key. Cannot verify integrity.\nDownloaded to $working. You can check and install it to $install manually: $!\n";
+    }
+    unlink("$working/mozilla.pgp");
+}
+
+# Verify the package
+if ($verify) {
+    print "Verifying download with Mozilla GPG key...\n";
+    system("gpg --verify $working/firefox-$version.tar.bz2.asc");
+    if ($?) {
+        die "Warning: failed to verify download. Signing failed.\nDownloaded to $working. You can check and install it to $install manually: $!\n";
+    }
+}
+
+# Uncompress
+print "Uncompressing download with bunzip2...\n";
+system("bunzip2 $working/firefox-$version.tar.bz2");
+if ($?) {
+    die "Failed to uncompress: $!\n";
+}
+
+# Extract
+print "Extracting from TAR archive...\n";
+system("tar -xf $working/firefox-$version.tar -C $working");
+if ($?) {
+    die "Failed to extract: $!\n";
+}
+
+# Bin the old backup
+if (-e "$install/.firefox.old") {
+    print "Removing previous backup folder...\n";
+    system("rm -rf $install/.firefox.old");
+    if ($?) {
+        die "Failed to remove: $!\n";
+    }
+}
+
+# Move current to old
+print "Backing up currently installed version ($current) to $install/.firefox.old...\n";
+system("mv $install/firefox $install/.firefox.old");
+if ($?) {
+    die "Failed to move: $!\n";
+}
+
+# Move new to current
+print "Moving new version to $install for final installation...\n";
+system("mv $working/firefox $install/");
+if ($?) {
+    die "Failed to move: $!\n";
+}
+
+# Hurray!
+print "Installation of version $version complete. You should restart firefox whenever it is convenient.\n";
+exit();