Fire Time Tracker от Francesco De Stefano

How much time you spend on the web?
–– This add-on tracks and limits time you spent on sites

### Features ###
* Total time spent browsing
* Total time spent browsing by days
* Time spent on individual websites
* Total time and percentage on chart
* Percentage ratio of domain
* Export data to CSV
* Works offline
* All information is stored locally! No data leaves your computer over the network.

Release 1.1.0:
- Backup and restore data *
- Pass data from background page to popup and show hint with features *
- Added average time by active days

* Since v1.1.1 these enhancements have been suspended due to significant memory consumption