1. webgl2renderingcontext api: gettransformfeedbackvarying

2. webgl2renderingcontext api: transformfeedbackvaryings

3. html element: script: type: `type="speculationrules"`: `expects_no_vary_search` key

4. headers http header: no-vary-search

5. headers http header: no-vary-search: http cache

6. headers http header: no-vary-search: speculation rules navigational prefetch

7. headers http header: no-vary-search: speculation rules prerender

8. headers http header: vary