There’s a lot of things but especially that of developer tools. They are horrible and I often run into many things going wrong when using it such as elements not showing at all and weird versions of errors showing in the console. It also has issues with site compatibility from a development standpoint. Many commonly used Web standards (as shown by mozillas own documentation) are just not present on Firefox. I remember there being complaints over Microsoft teams or YouTube not working on Firefox. People blamed Microsoft and Google, but it was actually mozillas fault for not adding standard web elements and JavaScript functions.
There’s a lot of things but especially that of developer tools. They are horrible and I often run into many things going wrong when using it such as elements not showing at all and weird versions of errors showing in the console. It also has issues with site compatibility from a development standpoint. Many commonly used Web standards (as shown by mozillas own documentation) are just not present on Firefox. I remember there being complaints over Microsoft teams or YouTube not working on Firefox. People blamed Microsoft and Google, but it was actually mozillas fault for not adding standard web elements and JavaScript functions.