I discovered this while building character sheets. When you give an input of type number the following style (to mirror Chrome behaviour in Firefox) : input[type=number] {
-moz-appearance: textfield;
}
input[type=number]:hover,
input[type=number]:focus {
-moz-appearance: number-input;
} It will not save any values entered into it to the character's attributes (while using Firefox). You can see on the Attributes & Abilities tab that the value is not changed, respectively the attribute created. Values assigned in Chrome will work fine (but be esssentially uneditable in Firefox, in the sense that they will reset once you reopen the sheet).