My default_header_block.xml path is
app/design/frontend/custom-theme/my-first-theme/Magento_Theme/layout/default_head_blocks.xml
my css file
app/design/frontend/custom-theme/my-first-theme/web/css/abc.css
But my abc.css file loaded inside following structure
pub/static/frontend/custom-theme/my-first-theme/en_US/css/abc.css
it will not display source path..
I followed the below steps to clear cache:
remove files inside 'var' folder and inside pub/static/frontend
How can I display my Custom css source link in website?