I reinstalled Firefox 2 on a MacMini with OS X 10.3, but could not remember how to get the single-button context menu setting restored. Thanks to Google, I found a posting that had the information:
- On the location (address) box, type about:config (this will bring up a list of all configurable settings)
- On the filter box, type click_hold – this will single out the ui.click_hold_context_menus setting, which has false under the value column
- Double click the ui.click_hold_context_menus line to turn false into true
- Close and restart Firefox, click holding will now bring up context menus