브라우저 배경색 글자색 바꾸기 (다크모드) (적용)
   
    Internet browser text and background color change
    - 눈 보호용(시력보호) , 다크 모드, dark mode
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* Firefox addon
    : Dark Background and Light Text 
https://addons.mozilla.org/en-US/firefox/addon/dark-background-light-text/
https://chrome.google.com/webstore/detail/dark-background-and-light/cdcoopnlkdlmphjpjggdmhohkiklonkh
Default foreground color : #EAEAEA - 236 236 236
Default background color : #292929 - 41 41 41
Default link color : #D5E0FF - 213 224 255
Default visited link color : #FFD2FF - 255 210 255
Default active link color : #FF96F0 - 255 150 240
Default selection color : #B9B9FF - 185 185 255
    
    - 어두운 테마(Dark Theme)
    FT DeepDark
https://addons.mozilla.org/en-US/firefox/addon/ft-deepdark/
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* Chrome Extension
//------------------------------------- 
chrome extension - super dark mode 
https://chromewebstore.google.com/detail/super-dark-mode/nlgphodeccebbcnkgmokeegopgpnjfkc
General Dark Themes -> Modern  
Background color : 40 40 40 
Text color : 250 250 250  
Link color : 213 224 255 
Visited link color : 255 218 255 
    - 기본 
Heading color : 211 211 211 
Input Borders color :  211 211 211 
Input Hints color : 173 216 223 
Dialog background color : 36 36 36 
//-------------------------------------
    Dark Reader
https://chrome.google.com/webstore/detail/dark-reader/eimadpbcbfnmbkopoojfekhnkhdbieeh
    : Babu Background Color
https://chrome.google.com/webstore/detail/babu-background-color/dkabogmdcebincpnhjkblipnceehimch
    암녹 foreground : #faffe6    background : #103200
    밝녹 foreground : #000000    background : #a5cca5
어두운 테마
* Morpheon Dark
https://chrome.google.com/webstore/detail/morpheon-dark/mafbdhjdkjnoafhfelkjpchpaepjknad