The WikimediaEditorTasks extension hasn't been maintained in a long time, and is likely no longer relevant to our features.
It was useful for two purposes:
- Keep a count of the number of edits that a user made to Wikidata descriptions and to Commons captions (and no other types of edits).
- Keep a count of the number of reverts of the above edits for the current user. (again, this is only the number of reverts of edits to Wikidata or Commons, not any other edits)
Purpose 1 is no longer used at all (!). The "contributions" count that we display now is just your total edit count that we fetch from meta=userinfo.
Purpose 2 is used for the "quality" score that we display in the Edits tab. But, as mentioned above, this only applies to edits made to Wikidata and Commons, and is therefore inaccurate. It would make more sense to move this to a local API call (e.g. list=usercontribs) and count up any revisions that have a tag of mw-reverted.
With both purposes no longer relevant or accurate, this extension is a prime candidate for deprecating.