Header does not expand in Firefox dev tools

[ollyollyollyltd]

When using PrettyPageHandler, long errors in the header are initially truncated, until the user hovers over the header. The header then expands to reveal the full message.

When using devtools in Firefox the expansion is not triggered (I presume because FF does not implement CSS events in the devtools response preview). This means that longer errors are truncated.

It would be nice to have an option in PrettyPageHandler to disable this behaviour via config.

In the meantime I have disabled it using CSS by adding a custom CSS file with the following:

.Whoops header {
    max-height: none;
}