Under Orion -> Settings -> Manage Search Engines..., I add a suggestion URL template for Wikipedia: https://en.wikipedia.org/w/api.php?action=opensearch&search=%s, along with a name, search URL template, and keyword w. When I enter input into the Orion URL bar starting with the keyword (or without it), I do not get suggestions from Wikipedia. The search template works fine with the keyword. Same thing when I try other sites with suggestion APIs including Google and DuckDuckGo.
The page https://en.wikipedia.org/w/api.php?action=opensearch&search=Example shows search suggestions for "Example" in JSON format. I expected to see these as suggestions when I type w Example into the URL bar. Whether or not this is how the feature is meant to be used, I would like the documentation to explain the right usage with an example because the documentation leaves it somewhat ambiguous.
Version 0.99.136-beta (WebKit 622.1.15.19.2) Build date September 03, 2025 Mac 15.6 (Build 24G84)
Sequoia (15)