Miro Not Loading on Firefox

  • 13 February 2024
  • 3 replies

I can login but then it loops perpetually on Firefox

3 replies

Same problem here, disabled any ad blocking features, still ended up in a perpetual loop.

Firefox: 123.0 (64-bit)

OS: Arch linux

Ignoring unsupported entryTypes: longtask. c~appEntry~canvasShowcas~viewOnlyCanvas.b73d9a1480761a25.js:5:14601
Cookie “userLocale” does not have a proper “SameSite” attribute value. Soon, cookies without the “SameSite” attribute or with an invalid value will be treated as “Lax”. This means that the cookie will no longer be sent in third-party contexts. If your application depends on this cookie being available in such contexts, please add the “SameSite=None“ attribute to it. To know more about the “SameSite“ attribute, read c~appEntry~canvasShowcas~viewOnlyCanvas.b73d9a1480761a25.js:5:16007
Uncaught (in promise) TypeError: Decoding failed.
TypeError: Decoding failed. library-sentry.2053ee75078342ec.js:7:6946
React Router caught the following error during render TypeError: Decoding failed.
Object { componentStack: "\nLazy\nj@\nD@\nz@\nW@\nL@\nSuspense\nt@" }
The resource at “” preloaded with link preload was not used within a few seconds. Make sure all attributes of the preload tag are set correctly. app
Source map error: Error: "sources" is a required argument.
Resource URL:
Source Map URL:

Source map error: Error: "sources" is a required argument.
Resource URL:
Source Map URL:



I’m having a very similar problem in Firefox 124.0.1 (64-bit) on Windows, images never load. I get the gray boxes that indicate pictures are loading but they never do.

Userlevel 5
Badge +1

Hi @pbausch


Sorry to hear you’re having trouble logging in.


Here’s a step that we’ve found usually works: Open a "Private" window in the Firefox browser, login to Miro and see if things load and work normally. If so, then clear the cache & cookies in the Firefox browser to help resolve the issue. I hope this helps!