We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

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 am I getting a 400 error message when I try to log on to tumblr?

  • 2 replies
  • 18 have this problem
  • 41 views
  • Last reply by cor-el

Leah7317
Leah7317
more options

I refreshed my tumblr page and got a 400 Bad Request message. I checked to see if I could log in on Microsoft Edge and I was able to but Edge does not have either the tumblr savior or xkit plugins that let me blacklist things I don't want to see on my dashboard available so I don't like using it. I already tried clearing the cache and cookies and all that accomplished was deleting all of the things I had blacklisted.

I refreshed my tumblr page and got a 400 Bad Request message. I checked to see if I could log in on Microsoft Edge and I was able to but Edge does not have either the tumblr savior or xkit plugins that let me blacklist things I don't want to see on my dashboard available so I don't like using it. I already tried clearing the cache and cookies and all that accomplished was deleting all of the things I had blacklisted.

Chosen solution

This issue can be caused by corrupted cookies or cookies that are blocked.

  • check the permissions for the domain in the currently selected tab in "Tools -> Page Info -> Permissions"

Clear the cache and remove the cookies from websites that cause problems via the "3-bar" Firefox menu button (Options/Preferences).

"Clear the cache:

  • Options/Preferences -> Privacy & Security -> Cached Web Content: "Clear Now"

"Remove the cookies" from websites that cause problems.

  • Options/Preferences -> Privacy & Security -> "Use custom settings for history" -> Cookies: "Show Cookies"

Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration is causing the problem.

  • switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Appearance
  • do NOT click the "Refresh Firefox" button on the Safe Mode start window
Read this answer in context 👍 0

All Replies (2)

Zombieslayer57
Zombieslayer57
more options

Its because firefox now will only allow so many cookies from one website. firefox determined that it uses too many cookies, and didn't connect. There is no current way to fix this. I will keep you updated until this problem can be fixed. Hope this helps! -Zombieslayer57

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

Chosen Solution

This issue can be caused by corrupted cookies or cookies that are blocked.

  • check the permissions for the domain in the currently selected tab in "Tools -> Page Info -> Permissions"

Clear the cache and remove the cookies from websites that cause problems via the "3-bar" Firefox menu button (Options/Preferences).

"Clear the cache:

  • Options/Preferences -> Privacy & Security -> Cached Web Content: "Clear Now"

"Remove the cookies" from websites that cause problems.

  • Options/Preferences -> Privacy & Security -> "Use custom settings for history" -> Cookies: "Show Cookies"

Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration is causing the problem.

  • switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Appearance
  • do NOT click the "Refresh Firefox" button on the Safe Mode start window