Recently, Firefox released an updated content blocking functionality that blocks all trackers the browser detects. While this is recommended for untrustworthy websites, it also causes several third party tools and libraries used by a trusted site like Accelo to break.
For example, when creating a note in Accelo with the “Strict” content blocking enabled, you may encounter one of the following errors:
To ensure that you no longer run into “Failed to load” errors in Firefox:
In your Firefox browser window, click the hamburger menu at the top right corner of the screen.
In the dropdown menu that appears, select Options.
On the Options page, click on the Privacy & Security tab, then under the Content Blocking section, select Standard.