Firefox allows users installing add-ons to add extra functionality. Many Firefox users have installed add-ons to meet their needs.
To ensure browser security, Firefox includes a verification system that checks if the add-on you are using has been verified for security. However, Firefox has a system problem that causes most of the add-on components to fail this verification after May 4. By default, Firefox will disable add-ons that fail validation, resulting in almost no add-ons can be used.
Firefox has introduced a version that fixes this issue. Users who need to use add-ons can update Firefox and resolve the issue.