Doesn't work on Linux? Rated 4 out of 5 stars
Installed v1.9 on Firefox 3.6.23 running on Ubuntu 10.04, but no icon or menu item appears anywhere, as far as I can determine. No mention anywhere in the description that it is incompatible with Linux systems or that it might require installation of additional support software.
Update: It does work on Linux when the instructions are followed, though it would be better if manual setup weren't needed. There are other cache cleaners and Firefox add-ons that place an icon or button in the GUI automatically.
Did you read the install instructions?
EDIT: Well, according to API, Mozilla thinks it's better if you don't add the icon automatically to a toolbar.