diff --git a/src/application/collections/linux.yaml b/src/application/collections/linux.yaml
index 8f7503ff..c1c25ab9 100644
--- a/src/application/collections/linux.yaml
+++ b/src/application/collections/linux.yaml
@@ -3558,82 +3558,98 @@ functions:
     parameters:
       - name: prefName
       - name: jsonValue
-    # prefs.js file (https://web.archive.org/web/20221029211757/https://kb.mozillazine.org/Prefs.js_file) exists at
-    #   - Default installation:
-    #     ~/.mozilla/firefox/<profile-name>/prefs.js
-    #   - Flatpak installation:
-    #     ~/.var/app/org.mozilla.firefox/.mozilla/firefox/<profile-name>/prefs.js
-    #   - Snap installation:
-    #     ~/snap/firefox/common/.mozilla/firefox/<profile-name>/prefs.js
+    docs: |-
+      This script either creates or updates the `user.js` file to set specific Mozilla Firefox preferences.
+
+      The `user.js` file can be found in a Firefox profile folder [1] and its location depends on the type of installation:
+    
+      - Default: `~/.mozilla/firefox/<profile-name>/user.js`
+      - Flatpak: `~/.var/app/org.mozilla.firefox/.mozilla/firefox/<profile-name>/user.js`
+      - Snap: `~/snap/firefox/common/.mozilla/firefox/<profile-name>/user.js`
+    
+      While the `user.js` file is optional [2], if it's present, the Firefox application will prioritize its settings over
+      those in `prefs.js` upon startup [1][2]. To prevent potential profile corruption, Mozilla advises against editing
+      `prefs.js` directly [2].
+
+      [1]: https://web.archive.org/web/20230811005205/https://kb.mozillazine.org/User.js_file "User.js file - MozillaZine Knowledge Base"
+      [2]: https://web.archive.org/web/20221029211757/https://kb.mozillazine.org/Prefs.js_file "Prefs.js file - MozillaZine Knowledge Base"
     code: |-
       pref_name='{{ $prefName }}'
       pref_value='{{ $jsonValue }}'
       echo "Setting preference \"$pref_name\" to \"$pref_value\"."
-      pref_file_paths=(
-        ~/.mozilla/firefox/*/prefs.js
-        ~/.var/app/org.mozilla.firefox/.mozilla/firefox/*/prefs.js
-        ~/snap/firefox/common/.mozilla/firefox/*/prefs.js
+      declare -a profile_paths=(
+        ~/.mozilla/firefox/*/
+        ~/.var/app/org.mozilla.firefox/.mozilla/firefox/*/
+        ~/snap/firefox/common/.mozilla/firefox/*/
       )
-      declare -i total_files_found=0
-      for pref_file in "${pref_file_paths[@]}"; do
-        if [ -f "$pref_file" ]; then
-          ((total_files_found++))
-          echo "$pref_file:"
-          pref_start="user_pref(\"$pref_name\","
-          pref_line="user_pref(\"$pref_name\", $pref_value);"
-          if ! grep --quiet "^$pref_start" "${pref_file}"; then
-            echo $'\t'"Preference is not configured before."
-            echo -n $'\n'"$pref_line" >> "$pref_file"
-            echo $'\t'"Successfully configured."
-          else
-            if grep --quiet "^$pref_line$" "${pref_file}"; then
-              echo $'\t'"Skipping. Preference is already configured as expected."
-            else
-              sed --in-place "/^$pref_start/d" "$pref_file"
-              echo $'\t'"Deleted assignment with unexpected value."
-              echo -n $'\n'"$pref_line" >> "$pref_file"
-              echo $'\t'"Successfully reconfigured with expected value."
-            fi
-          fi
+      declare -i total_profiles_found=0
+      for profile_dir in "${profile_paths[@]}"; do
+        if [ ! -d "$profile_dir" ]; then
+          continue
+        fi
+        if [[ ! "$(basename "$profile_dir")" =~ ^[a-z0-9]{8}\..+ ]]; then
+          continue # Not a profile folder
+        fi
+        ((total_profiles_found++))
+        user_js_file="${profile_dir}user.js"
+        echo "$user_js_file:"
+        if [ ! -f "$user_js_file" ]; then
+          touch "$user_js_file"
+          echo $'\t''Created new user.js file'
+        fi
+        pref_start="user_pref(\"$pref_name\","
+        pref_line="user_pref(\"$pref_name\", $pref_value);"
+        if ! grep --quiet "^$pref_start" "${user_js_file}"; then
+          echo -n $'\n'"$pref_line" >> "$user_js_file"
+          echo $'\t'"Successfully added a new preference in $user_js_file."
+        elif grep --quiet "^$pref_line$" "$user_js_file"; then
+          echo $'\t'"Skipping, preference is already set as expected in $user_js_file."
+        else
+          sed --in-place "/^$pref_start/c\\$pref_line" "$user_js_file"
+          echo $'\t'"Successfully replaced the existing incorrect preference in $user_js_file."
         fi
       done
-      if [ "$total_files_found" -eq 0 ]; then
-        echo "No changes, no preference file is found."
+      if [ "$total_profiles_found" -eq 0 ]; then
+        echo 'No profile folders are found, no changes are made.'
       else
-        echo "Ensured that $total_files_found profiles are compilant."
+        echo "Preferences verified in $total_profiles_found profiles."
       fi
     revertCode: |-
       pref_name='{{ $prefName }}'
       pref_value='{{ $jsonValue }}'
-      echo "Restoring \"$pref_name\" to its default."
-      pref_file_paths=(
-        ~/.mozilla/firefox/*/prefs.js
-        ~/.var/app/org.mozilla.firefox/.mozilla/firefox/*/prefs.js
-        ~/snap/firefox/common/.mozilla/firefox/*/prefs.js
+      echo "Reverting preference: \"$pref_name\" to its default."
+      declare -a profile_paths=(
+        ~/.mozilla/firefox/*/
+        ~/.var/app/org.mozilla.firefox/.mozilla/firefox/*/
+        ~/snap/firefox/common/.mozilla/firefox/*/
       )
-      declare -i total_files_found=0
-      for pref_file in "${pref_file_paths[@]}"; do
-        if [ -f "$pref_file" ]; then
-          ((total_files_found++))
-          echo "$pref_file:"
-          pref_start="user_pref(\"$pref_name\","
-          pref_line="user_pref(\"$pref_name\", $pref_value);"
-          if ! grep --quiet "^$pref_start" "${pref_file}"; then
-            echo $'\t'"Skipping. Preference is not configured before."
-          else
-            if grep --quiet "^$pref_line$" "${pref_file}"; then
-              sed --in-place "/^$pref_line/d" "$pref_file"
-              echo $'\t'"Successfully restored preference value to its default."
-            else
-              echo $'\t'"Skipping, the preference has value that is not configured by privacy.sexy."
-            fi
+      declare -i total_profiles_found=0
+      for profile_dir in "${profile_paths[@]}"; do
+        user_js_file="${profile_dir}user.js"
+        if [ ! -f "$user_js_file" ]; then
+          continue
+        fi
+        ((total_profiles_found++))
+        echo "$user_js_file:"
+        pref_start="user_pref(\"$pref_name\","
+        pref_line="user_pref(\"$pref_name\", $pref_value);"
+        if ! grep --quiet "^$pref_start" "${user_js_file}"; then
+          echo $'\t''Skipping, preference was not configured before.'
+        elif grep --quiet "^$pref_line$" "${user_js_file}"; then
+          sed --in-place "/^$pref_line/d" "$user_js_file"
+          echo $'\t''Successfully reverted preference to default.'
+          if ! grep --quiet '[^[:space:]]' "$user_js_file"; then
+            rm "$user_js_file"
+            echo $'\t''Removed user.js file as it became empty.'
           fi
+        else
+          echo $'\t''Skipping, the preference has value that is not configured by privacy.sexy.'
         fi
       done
-      if [ "$total_files_found" -eq 0 ]; then
-        echo "No changes, no preference file is found."
+      if [ "$total_profiles_found" -eq 0 ]; then
+        echo 'No reversion was necessary.'
       else
-        echo "Ensured that $total_files_found profiles are compilant."
+        echo "Preferences verified in $total_profiles_found profiles."
       fi
   -
     name: RenameFile