While implementing bug 1303333, I noticed an odd behaviour: when performing searches from the awesomebar using the keyword associated with a search engine, it doesn't get counted into Telemetry (i.e. SEARCH_COUNT histogram). If we perform the same search by clicking on the one-off engine icon, it gets properly counted. STR: - Define a keyword for a search engine in the Preferences -> Search (for example, 'ddg') - In the urlbar, write 'ddg some search' and press enter. - It will search using the search engine identified by the 'ddg' keyword. - In about:telemetry, expand the Keyed Histogram section and look up the SEARCH_COUNT histogram: there will be no count associated with the last search.

could be the same as bug 1306639. This regression is recent and I'm trying to fix it.

it seems to be fixed in current nightly, so bug 1306639 did its job. After using a "g" search engine alias for Google I see a SEARCH_COUNT entry for google.