diff --git a/ShadowFox_updater_linux.sh b/ShadowFox_updater_linux.sh
index f99f768..bee073a 100644
--- a/ShadowFox_updater_linux.sh
+++ b/ShadowFox_updater_linux.sh
@@ -1,31 +1,25 @@
 #!/bin/bash
 
-### ShadowFox updater for Mac/Linux
+### ShadowFox updater for Linux
 ## author: @overdodactyl
-## version: 1.0
+## version: 1.1
 
 userChrome="https://raw.githubusercontent.com/overdodactyl/ShadowFox/master/userChrome.css"
 userContent="https://raw.githubusercontent.com/overdodactyl/ShadowFox/master/userContent.css"
 
-echo -e "\nThis script should be run from your inside your Firefox profile.\n"
+echo -e "\nThis script should be run from inside your Firefox profile.\n"
 
 currdir=$(pwd)
 
 ## get the full path of this script (readlink for Linux, greadlink for Mac with coreutils installed)
 sfp=$(readlink -f "${BASH_SOURCE[0]}" 2>/dev/null || greadlink -f "${BASH_SOURCE[0]}" 2>/dev/null)
 
-## fallback for Macs without coreutils
+## fallback for Macs without coreutils - may cause problems if symbolic links are encountered
 if [ -z "$sfp" ]; then sfp=${BASH_SOURCE[0]}; fi
 
 ## change directory to the Firefox profile directory
 cd "$(dirname "${sfp}")"
 
-## Make chrome directory if it doesn't exist
-mkdir -p chrome;
-
-## Move to chrome directory
-cd chrome;
-
 echo -e "\nUpdating userContent.css and userChrome.css for Firefox profile:\n$(pwd)\n"
 
 if [ -e userContent.css ]; then
@@ -44,15 +38,35 @@ read -p "Continue Y/N? " -n 1 -r
 echo -e "\n\n"
 
 if [[ $REPLY =~ ^[Yy]$ ]]; then
+
+  ## Make chrome directory if it doesn't exist
+  mkdir -p chrome;
+
+  ## Move to chrome directory
+  cd chrome;
+
+  ## Make ShadowFox_customization directory if it doesn't exist
+  mkdir -p ShadowFox_customization;
+
+  ## Create all customization files if they don't exist
+  touch ./ShadowFox_customization/colorOverrides.css
+  touch ./ShadowFox_customization/internal_UUIDs.txt
+  touch ./ShadowFox_customization/userContent_customization.css
+  touch ./ShadowFox_customization/userChrome_customization.css
+
+  if [ -e userChrome.css ] || [ -e userContent.css ] ; then
+    ## Make chrome backups folder if it doesn't extern
+    mkdir -p chrome_backups
+  fi
   if [ -e userChrome.css ]; then
     # backup current userChrome.css file
-    bakfile="userChrome.backup.$(date +"%Y-%m-%d_%H%M")"
-    mv userChrome.css "${bakfile}" && echo "Your previous userChrome.css file was backed up: ${bakfile}"
+    bakfile="userChrome.backup.$(date +"%Y-%m-%d_%H%M%S")"
+    mv userChrome.css "chrome_backups/${bakfile}" && echo "Your previous userChrome.css file was backed up: ${bakfile}"
   fi
   if [ -e userContent.css ]; then
     # backup current userChrome.css file
-    bakfile="userContent.backup.$(date +"%Y-%m-%d_%H%M")"
-    mv userContent.css "${bakfile}" && echo "Your previous userContent.css file was backed up: ${bakfile}"
+    bakfile="userContent.backup.$(date +"%Y-%m-%d_%H%M%S")"
+    mv userContent.css "chrome_backups/${bakfile}" && echo "Your previous userContent.css file was backed up: ${bakfile}"
   fi
 
   # download latest ShadowFox userChrome.css
@@ -63,36 +77,57 @@ if [[ $REPLY =~ ^[Yy]$ ]]; then
   echo -e "\ndownloading latest ShadowFox userContent.css file\n"
   curl -O ${userContent} && echo "ShadowFox userContent.css has been downloaded"
 
+  if [ -s ./ShadowFox_customization/internal_UUIDs.txt ]; then
+    ## Insert any UUIDs defined in internal_UUIDs.txt into userContent.css
+    while IFS='' read -r line || [[ -n "$line" ]]; do
+        IFS='=' read -r -a array <<< "$line"
+        sed -i "s/${array[0]}/${array[1]}/" "userContent.css"
+    done < "./ShadowFox_customization/internal_UUIDs.txt"
+    echo -e "\nYour internal UUIDs have been inserted.\n"
+  else
+    echo -e "\nYou have not defined any internal UUIDs for webextensions.\n"
+    echo -e "\nIf you choose not to do so, webextensions will not be styled with a dark theme and may have compatibility issues in about:addons.\n"
+    echo -e "\nFor more information, see here:\n"
+    echo -e "\nhttps://github.com/overdodactyl/ShadowFox/wiki/Altering-webextensions\n"
+  fi
+
+  if [ -s ./ShadowFox_customization/colorOverrides.css ]; then
+    ## Delete everything inbetween override markers
+    sed -i '/\/\*! Begin color overrides \*\//,/\/\*! End color overrides \*\//{//!d;}' userContent.css
+    sed -i '/\/\*! Begin color overrides \*\//,/\/\*! End color overrides \*\//{//!d;}' userChrome.css
+
+    ## Insert everything from colorOverrides.css
+    sed -i '/\/\*! Begin color overrides \*\// r ./ShadowFox_customization/colorOverrides.css' userContent.css
+    sed -i '/\/\*! Begin color overrides \*\// r ./ShadowFox_customization/colorOverrides.css' userChrome.css
+
+    echo -e "\nYour custom colors have been set.\n"
+  else
+    echo -e "\nYou are using the default colors set by ShadowFox\n"
+    echo -e "\nYou can customize the colors used by editing colorOverrides.css\n"
+  fi
+
+  if [ -s ./ShadowFox_customization/userContent_customization.css ]; then
+    ## Append tweaks to the end of userContent.css
+    cat ./ShadowFox_customization/userContent_customization.css >> userContent.css
+    echo -e "\nYour custom userContent.css tweaks have been applied.\n"
+  else
+    echo -e "\nYou do not have any custom userContent.css tweaks.\n"
+    echo -e "\nYou can customize userContent.css using userContent_customization.css.\n"
+  fi
+
+  if [ -s ./ShadowFox_customization/userChrome_customization.css ]; then
+    ## Append tweaks to the end of userContent.css
+    cat ./ShadowFox_customization/userChrome_customization.css >> userChrome.css
+    echo -e "\nYour custom userChrome.css tweaks have been applied.\n"
+  else
+    echo -e "\nYou do not have any custom userChrome.css tweaks.\n"
+    echo -e "\nYou can customize userChrome.css using userChrome_customization.css.\n"
+  fi
+
 else
   echo -e "\nProcess aborted\n"
 fi
 
 
-## change any color variables here
-PRIMARY_ACCENT_COLOR="#279f27"
-PRIMARY_ACCENT_COLOR_DARK="#228b22"
-PRIMARY_ACCENT_COLOR_DARKEST="#006100"
-
-sed -i "s/--primary-accent-color: var(--blue-40);/--primary-accent-color: $PRIMARY_ACCENT_COLOR;/" "userChrome.css"
-sed -i "s/--primary-accent-color: var(--blue-40);/--primary-accent-color: $PRIMARY_ACCENT_COLOR;/" "userContent.css"
-
-sed -i "s/--primary-accent-color-dark: var(--blue-50);/--primary-accent-color-dark: $PRIMARY_ACCENT_COLOR_DARK;/" "userChrome.css"
-sed -i "s/--primary-accent-color-dark: var(--blue-50);/--primary-accent-color-dark: $PRIMARY_ACCENT_COLOR_DARK;/" "userContent.css"
-
-sed -i "s/--primary-accent-color-darkest: var(--blue-60);/--primary-accent-color-darkest: $PRIMARY_ACCENT_COLOR_DARKEST;/" "userChrome.css"
-sed -i "s/--primary-accent-color-darkest: var(--blue-60);/--primary-accent-color-darkest: $PRIMARY_ACCENT_COLOR_DARKEST;/" "userContent.css"
-
-
-## change any webextension Internal UUIDs here.
-## one example is provided
-
-## Define Internal UUID's for extensions here
-uMATRIX_INTERNAL_UUID="32818407-cb70-5d40-9f8d-81ed9f2012a6"
-
-## Replace Ineternal UUID placeholders with variables defined above
-sed -i "s/9eba7fab-892c-7b42-a57e-b876d4196d70/$uMATRIX_INTERNAL_UUID/" "userContent.css"
-
-
-
 ## change directory back to the original working directory
 cd "${currdir}"
diff --git a/ShadowFox_updater_mac.sh b/ShadowFox_updater_mac.sh
new file mode 100644
index 0000000..7d219f4
--- /dev/null
+++ b/ShadowFox_updater_mac.sh
@@ -0,0 +1,133 @@
+#!/bin/bash
+
+### ShadowFox updater for Mac
+## author: @overdodactyl
+## version: 1.1
+
+userChrome="https://raw.githubusercontent.com/overdodactyl/ShadowFox/master/userChrome.css"
+userContent="https://raw.githubusercontent.com/overdodactyl/ShadowFox/master/userContent.css"
+
+echo "\nThis script should be run from inside your Firefox profile.\n"
+
+currdir=$(pwd)
+
+## get the full path of this script (readlink for Linux, greadlink for Mac with coreutils installed)
+sfp=$(readlink -f "${BASH_SOURCE[0]}" 2>/dev/null || greadlink -f "${BASH_SOURCE[0]}" 2>/dev/null)
+
+## fallback for Macs without coreutils - may cause problems if symbolic links are encountered
+if [ -z "$sfp" ]; then sfp=${BASH_SOURCE[0]}; fi
+
+## change directory to the Firefox profile directory
+cd "$(dirname "${sfp}")"
+
+echo "Updating userContent.css and userChrome.css for Firefox profile:\n$(pwd)\n"
+
+if [ -e userContent.css ]; then
+  echo "Your current userContent.css file for this profile will be backed up and the latest ShadowFox version from github will take its place."
+else
+  echo "A userContent.css file does not exist in this profile. If you continue, the latest ShadowFox version from github will be downloaded."
+fi
+
+if [ -e userChrome.css ]; then
+  echo "Your current userChrome.css file for this profile will be backed up and the latest ShadowFox version from github will take its place.\n"
+else
+  echo "A userChrome.css file does not exist in this profile. If you continue, the latest ShadowFox version from github will be downloaded.\n"
+fi
+
+read -p "Continue Y/N? " -n 1 -r
+echo "\n\n"
+
+if [[ $REPLY =~ ^[Yy]$ ]]; then
+
+  ## Make chrome directory if it doesn't exist
+  mkdir -p chrome;
+
+  ## Move to chrome directory
+  cd chrome;
+
+  ## Make ShadowFox_customization directory if it doesn't exist
+  mkdir -p ShadowFox_customization;
+
+  ## Create all customization files if they don't exist
+  touch ./ShadowFox_customization/colorOverrides.css
+  touch ./ShadowFox_customization/internal_UUIDs.txt
+  touch ./ShadowFox_customization/userContent_customization.css
+  touch ./ShadowFox_customization/userChrome_customization.css
+
+  if [ -e userChrome.css ] || [ -e userContent.css ] ; then
+    ## Make chrome backups folder if it doesn't extern
+    mkdir -p chrome_backups
+  fi
+  if [ -e userChrome.css ]; then
+    # backup current userChrome.css file
+    bakfile="userChrome.backup.$(date +"%Y-%m-%d_%H%M%S")"
+    mv userChrome.css "chrome_backups/${bakfile}" && echo "Your previous userChrome.css file was backed up: ${bakfile}"
+  fi
+  if [ -e userContent.css ]; then
+    # backup current userChrome.css file
+    bakfile="userContent.backup.$(date +"%Y-%m-%d_%H%M%S")"
+    mv userContent.css "chrome_backups/${bakfile}" && echo "Your previous userContent.css file was backed up: ${bakfile}"
+  fi
+
+  # download latest ShadowFox userChrome.css
+  echo "downloading latest ShadowFox userChrome.css file"
+  curl -O ${userChrome} && echo "\nShadowFox userChrome.css has been downloaded"
+
+  # download latest ShadowFox userContent.css
+  echo "downloading latest ShadowFox userContent.css file"
+  curl -O ${userContent} && echo "\nShadowFox userContent.css has been downloaded\n"
+
+  if [ -s ./ShadowFox_customization/internal_UUIDs.txt ]; then
+    ## Insert any UUIDs defined in internal_UUIDs.txt into userContent.css
+    while IFS='' read -r line || [[ -n "$line" ]]; do
+        IFS='=' read -r -a array <<< "$line"
+        sed -i '' "s/${array[0]}/${array[1]}/" "userContent.css"
+    done < "./ShadowFox_customization/internal_UUIDs.txt"
+    echo "Your internal UUIDs have been inserted.\n"
+  else
+    echo "You have not defined any internal UUIDs for webextensions."
+    echo "If you choose not to do so, webextensions will not be styled with a dark theme and may have compatibility issues in about:addons."
+    echo "For more information, see here:"
+    echo "https://github.com/overdodactyl/ShadowFox/wiki/Altering-webextensions\n"
+  fi
+
+  if [ -s ./ShadowFox_customization/colorOverrides.css ]; then
+    ## Delete everything inbetween override markers
+    sed -i '' '/\/\*! Begin color overrides \*\//,/\/\*! End color overrides \*\//{//!d;}' userContent.css
+    sed -i '' '/\/\*! Begin color overrides \*\//,/\/\*! End color overrides \*\//{//!d;}' userChrome.css
+
+    ## Insert everything from colorOverrides.css
+    sed -i '' '/\/\*! Begin color overrides \*\// r ./ShadowFox_customization/colorOverrides.css' userContent.css
+    sed -i '' '/\/\*! Begin color overrides \*\// r ./ShadowFox_customization/colorOverrides.css' userChrome.css
+
+    echo "Your custom colors have been set.\n"
+  else
+    echo "You are using the default colors set by ShadowFox"
+    echo "You can customize the colors used by editing colorOverrides.css\n"
+  fi
+
+  if [ -s ./ShadowFox_customization/userContent_customization.css ]; then
+    ## Append tweaks to the end of userContent.css
+    cat ./ShadowFox_customization/userContent_customization.css >> userContent.css
+    echo "Your custom userContent.css tweaks have been applied.\n"
+  else
+    echo "You do not have any custom userContent.css tweaks."
+    echo "You can customize userContent.css using userContent_customization.css.\n"
+  fi
+
+  if [ -s ./ShadowFox_customization/userChrome_customization.css ]; then
+    ## Append tweaks to the end of userContent.css
+    cat ./ShadowFox_customization/userChrome_customization.css >> userChrome.css
+    echo "Your custom userChrome.css tweaks have been applied.\n"
+  else
+    echo "You do not have any custom userChrome.css tweaks."
+    echo "You can customize userChrome.css using userChrome_customization.css.\n"
+  fi
+
+else
+  echo "Process aborted"
+fi
+
+
+## change directory back to the original working directory
+cd "${currdir}"
diff --git a/userContent_imports.css b/userContent_imports.css
index a79ddd6..6dee01f 100644
--- a/userContent_imports.css
+++ b/userContent_imports.css
@@ -29,21 +29,21 @@
 
 /* Import Relevant webextension tweaks here
  * IMPORTANT: If used, change the Internal UUID in the corresponding css file */
-@import "userContent-files/webextension-tweaks/tree_style_tabs.css";
+@import "userContent-files/webextension-tweaks/tree_style_tab.css";
 @import "userContent-files/webextension-tweaks/multiple_tabs_handler.css";
 @import "userContent-files/webextension-tweaks/dark_mode.css";
-@import "userContent-files/webextension-tweaks/uBlockOrigin.css";
-@import "userContent-files/webextension-tweaks/uBO_Scope.css";
-@import "userContent-files/webextension-tweaks/httpsEverywhere.css";
+@import "userContent-files/webextension-tweaks/ublock_origin.css";
+@import "userContent-files/webextension-tweaks/ubo_scope.css";
+@import "userContent-files/webextension-tweaks/https_everywhere.css";
 @import "userContent-files/webextension-tweaks/decentraleyes.css";
 @import "userContent-files/webextension-tweaks/pocket.css";
-@import "userContent-files/webextension-tweaks/skipredirect.css";
+@import "userContent-files/webextension-tweaks/skip_redirect.css";
 @import "userContent-files/webextension-tweaks/request_control.css";
 @import "userContent-files/webextension-tweaks/multi_account_containers.css";
 @import "userContent-files/webextension-tweaks/smart_https.css";
 @import "userContent-files/webextension-tweaks/tab_suspender.css";
 @import "userContent-files/webextension-tweaks/cookie_autodelete.css";
-@import "userContent-files/webextension-tweaks/uMatrix.css";
+@import "userContent-files/webextension-tweaks/umatrix.css";
 @import "userContent-files/webextension-tweaks/brief.css";
 @import "userContent-files/webextension-tweaks/vim_vixen.css";
 @import "userContent-files/webextension-tweaks/neat_url.css";