Title: Browser Cache: X-XSS Protection Syntax Error
Last modified: September 29, 2018

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# Browser Cache: X-XSS Protection Syntax Error

 *  [Jesse Messenger](https://wordpress.org/support/users/jmessy919/)
 * (@jmessy919)
 * [7 years, 7 months ago](https://wordpress.org/support/topic/browser-cache-x-xss-protection-syntax-error/)
 * Hello, upon testing I just found this error in Google Chrome Console:
 * `Error parsing header X-XSS-Protection: 1, 1: expected semicolon at character
   position 1. The default protections will be applied.`
 * It does not matter what mode I have this feature on, the error still appears 
   even though it reflects the mode change.
 * This console error does not appear in Firefox, Internet Explorer, or Edge.
 * Thank you.
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fbrowser-cache-x-xss-protection-syntax-error%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 2 replies - 1 through 2 (of 2 total)

 *  [Fist Full of Crisco](https://wordpress.org/support/users/fistfullofcrisco/)
 * (@fistfullofcrisco)
 * [7 years, 7 months ago](https://wordpress.org/support/topic/browser-cache-x-xss-protection-syntax-error/#post-10736380)
 * What’s your X-XSS-Protection set to? It either should be 0 or 1 or 1; mode=block.
   
   Are you manually setting this in your htaccess file or using w3tc, because w3tc
   doesnt allow you to set “1, 1” as an option since that is not a valid option.
 *  Thread Starter [Jesse Messenger](https://wordpress.org/support/users/jmessy919/)
 * (@jmessy919)
 * [7 years, 7 months ago](https://wordpress.org/support/topic/browser-cache-x-xss-protection-syntax-error/#post-10736387)
 * Hi [@fistfullofcrisco](https://wordpress.org/support/users/fistfullofcrisco/),
 * It is set to 1 in W3TC. I am not setting anything in htaccess.
 * Thank you.
 * Jesse

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘Browser Cache: X-XSS Protection Syntax Error’ is closed to new replies.

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## Tags

 * [browser cache](https://wordpress.org/support/topic-tag/browser-cache/)
 * [chrome](https://wordpress.org/support/topic-tag/chrome/)
 * [xss](https://wordpress.org/support/topic-tag/xss/)

 * 2 replies
 * 2 participants
 * Last reply from: [Jesse Messenger](https://wordpress.org/support/users/jmessy919/)
 * Last activity: [7 years, 7 months ago](https://wordpress.org/support/topic/browser-cache-x-xss-protection-syntax-error/#post-10736387)
 * Status: not resolved