FIREFOX: Can't save asset/Cannot close windows

[SteveMarvin]

When logging in via Firefox, one can create a new project that persists. One can also add an image asset and it will save. However, although one can add a text asset, it never saves, and the window cannot subsequently be closed.

If one logs out, the text asset is present in the asset list, but the title and any text content has been lost. Image assets come up fine.