Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Why does firefox append %0DX-ontent-Length: 0 to the URL of my Wordpress Site? No other browser does this.

  • 2 replies
  • 1 has this problem
  • 164 views
  • Last reply by cor-el
  • Konponduta

tidewater
tidewater

Makes every page throw a 404 error.

This ONLY happens with Firefox. Not with IE, Chrome, Opera, Safari, etc.

Makes every page throw a 404 error. This ONLY happens with Firefox. Not with IE, Chrome, Opera, Safari, etc.

Chosen solution

Clear the cache and the cookies from sites that cause problems.

"Clear the Cache":

  • Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now"

"Remove Cookies" from sites causing problems:

  • Tools > Options > Privacy > Cookies: "Show Cookies"
Read this answer in context 👍 0

All Replies (2)

FireFoxTweaker
FireFoxTweaker

Your browser is corupted you need to reinstall it, you will keep all your bookmarks.

cor-el
cor-el
  • Moderator
  • Top 10 Contributor

Chosen Solution

Clear the cache and the cookies from sites that cause problems.

"Clear the Cache":

  • Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now"

"Remove Cookies" from sites causing problems:

  • Tools > Options > Privacy > Cookies: "Show Cookies"