Calculation Pad от Jacques

This extensions aims to be one of the first to implement a serverless single page application in jQuery featuring cross-platform compatibility, Excel like spreadsheet functionality from jSpreadsheet v4, and made available in a self-contained extension page directly from within Thunderbird/Firefox/Sea Monkey. A plain text pad is also included. A key feature of this extension is file input and output through base64 conversion. Plain text/calculated values and styles/formats can be imported and exported to and from the user's device. Plain text from the text pad can also be imported and exported to and from the user's device.