Provides user with tab related stats and memory usage ..
https://addons.mozilla.org/firefox/addon/tab-data/
Features
- How many tabs are currently open
- How many tabs have been opened during this Firefox session
- How many tabs have been opened since addon installed
- Display tab memory usage in title
- Preference to toggle tab memory usage on/off
- Preference to set interval between memory usage collection
Monitoring memory
The addon uses the nsIMemoryReporterManager interface to extract memory statistics from Firefox, specifically the getReports() method.
For each process, data is parsed from the explicit tree (which represents all the memory allocated via explicit calls to allocation functions). More specifically, from the explicit/window-objects/ tree path (which represents all JavaScript window objects) only if the leaf node contains an id and a url matching a currently open tab, otherwise the node is disregarded.
Measurements use bytes as their unit and the value of each leaf node is the sum of all its children, therefore the value displayed in a tab title corresponds to a child of explicit/window-objects/.