A list of sites Lexa refuses to run on, grouped into five categories. All hardcoded into the extension.
A sample of the list below. There are more in each group that aren't shown.
Dev & design
Syntax and tooling break if the page gets restyled.
github.com
gitlab.com
bitbucket.org
figma.com
stackoverflow.com
codesandbox.io
codepen.io
replit.com
localhost
Media
Controls and captions, not long-form reading.
youtube.com
youtu.be
twitch.tv
netflix.com
spotify.com
Social
Feeds and comments, not articles.
reddit.com
old.reddit.com
Search
Result snippets, not full pages.
bing.com
duckduckgo.com
search.yahoo.com
yandex.com
baidu.com
Maps
Interface, not text.
Maps.google.com
And if there's a site that isn't on this list but you'd still rather Lexa stayed off, you can add your own. The list above is what the extension decides for you. The rest you decide yourself.