I'm looking at the https://www.mozilla.org/en-US/privacy/firefox/#lawful-bases section of the new privacy document which goes into more detail on what is collected and why, along with the "Types of Data Defined" section above it that describes the different data.
It doesn't differentiate when that data is stored locally, when it is sent to (and collected by) Mozilla, and when it is sent/accessed by the website you are on/using.
Likewise, because "Interaction data" covers both "how many tabs you have open" and "what you’ve clicked on" (as well as ad related information in the next paragraph) it can cover things like handling anchor ping attributes (what you've clicked on) which are nec1essary for Firefox to work w.r.t. that feature vs. collecting ad related information ("Click counts, impression data, attribution data, how many searches performed, time on page, ad and sponsored tile clicks.") which is not.
With those broad information categories they are combining different use cases from using the browser, telemetry, and collecting data useful for advertising.
Another example: in the "To adapt Firefox to your needs" section they explicitly call out sending location data to websites like Google Maps but the data collected is listed is "Any data type" not "Location".
I know there are other cases, but the specific wording is vague and unclear. For example that section mentions being able to "clear your browsing history". As a developer I can infer that that is related to JavaScript APIs being able to access your browsing history, but that isn't called out in this section so it is unclear that this is what they are referring to.
It doesn't differentiate when that data is stored locally, when it is sent to (and collected by) Mozilla, and when it is sent/accessed by the website you are on/using.
Likewise, because "Interaction data" covers both "how many tabs you have open" and "what you’ve clicked on" (as well as ad related information in the next paragraph) it can cover things like handling anchor ping attributes (what you've clicked on) which are nec1essary for Firefox to work w.r.t. that feature vs. collecting ad related information ("Click counts, impression data, attribution data, how many searches performed, time on page, ad and sponsored tile clicks.") which is not.
With those broad information categories they are combining different use cases from using the browser, telemetry, and collecting data useful for advertising.
Another example: in the "To adapt Firefox to your needs" section they explicitly call out sending location data to websites like Google Maps but the data collected is listed is "Any data type" not "Location".
I know there are other cases, but the specific wording is vague and unclear. For example that section mentions being able to "clear your browsing history". As a developer I can infer that that is related to JavaScript APIs being able to access your browsing history, but that isn't called out in this section so it is unclear that this is what they are referring to.