![style-src 'self' https://maxcdn.bootstrapcdn.com/bootstrap/". Either the 'unsafe-inline' keyword, a hash - Stack Overflow style-src 'self' https://maxcdn.bootstrapcdn.com/bootstrap/". Either the 'unsafe-inline' keyword, a hash - Stack Overflow](https://i.stack.imgur.com/vqQIf.png)
style-src 'self' https://maxcdn.bootstrapcdn.com/bootstrap/". Either the 'unsafe-inline' keyword, a hash - Stack Overflow
![Magento 2.3.5: «Refused to load the stylesheet ... because it violates the following Content Security Policy directive: "style-src getfirebug.com 'self' 'unsafe-inline'". Note that 'style-src-elem' was not explicitly set, so 'style-src' is used Magento 2.3.5: «Refused to load the stylesheet ... because it violates the following Content Security Policy directive: "style-src getfirebug.com 'self' 'unsafe-inline'". Note that 'style-src-elem' was not explicitly set, so 'style-src' is used](https://user-images.githubusercontent.com/83204/89123407-e3f5d580-d4f0-11ea-92e5-4c6f610bd863.png)
Magento 2.3.5: «Refused to load the stylesheet ... because it violates the following Content Security Policy directive: "style-src getfirebug.com 'self' 'unsafe-inline'". Note that 'style-src-elem' was not explicitly set, so 'style-src' is used
![Webpack4+ study notes: 9. CSS style processing to remove redundant styles and automatically append css attribute prefix - Programmer Sought Webpack4+ study notes: 9. CSS style processing to remove redundant styles and automatically append css attribute prefix - Programmer Sought](https://www.programmersought.com/images/502/afa478dcbc35a26e74e0e8645c6344fe.png)