FF Highlighter is a free, open-source Firefox extension that highlights all instances of selected text (minimum 3 characters) on a page. It helps users quickly spot repeated terms or phrases, improving reading and navigation efficiency.
In the Browser DevTools & extensions space, Victor Ulijn / ff-highlighter takes a focused approach. Quickly highlighting all occurrences of selected text in Firefox for easier reading and navigation. It is built as an open-source project for firefox users seeking enhanced text selection. Victor Ulijn / ff-highlighter is free to use. It runs on the web and embeddable surfaces.
Behind Victor Ulijn / ff-highlighter is Victor Ulijn, and the product first shipped in 2026. Key capabilities include text highlighting, multi-instance selection, and firefox integration.
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FF Highlighter verified by the PulseGate indexer
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