Best Firefox Add-ons for AI Prompts (2026)

TL;DR: Firefox's AI-prompting add-on catalogue is real but noticeably smaller than Chrome's, and several big Chrome names simply are not here. We verified nine add-ons directly on addons.mozilla.org on 3 September 2026, split them into prompt managers and prompt enhancers, and checked which well-known Chrome tools have no Firefox listing at all.

What are the best Firefox add-ons for AI prompts in 2026?

It depends on whether you want somewhere to keep prompts you already wrote, or something that rewrites a rough one before you send it. Nine add-ons cover that split well enough to be worth naming, and every row below comes from that add-on's own listing on addons.mozilla.org, read on 3 September 2026. We did not install and test each one end to end; where the listing states a capability, that is what is reported, and where a listing is thin or stale, that is said too.

That last row is worth flagging on its own: Prompt Builder for AI has not shipped an update in over two years, which is long enough for ChatGPT's own page structure to have changed more than once underneath it.

Which of these add-ons manage a prompt library rather than rewrite one?

Four of the nine are primarily storage: somewhere to keep prompts you already wrote so you can find and reuse them.

Superpower ChatGPT is the largest of the group by feature count. Its own listing describes it as "the first ChatGPT browser extension ever released", and the current build adds folders, full-text search, a public prompt library with {{double curly bracket}} prompt templates, pinned messages, and a prompt optimizer alongside the manager. It is ChatGPT-only; nothing in the listing claims Claude or Gemini support.

AI Prompt Genius (listed on Firefox under the slug chatgpt-history, formerly named ChatGPT History) describes itself as a "free, open-source browser extension" for discovering, importing and reusing ChatGPT prompt templates, alongside a separate feature that saves your chat history locally as Markdown, HTML, PDF or PNG. The source is public on GitHub, which is unusual in this category and worth something if you want to audit what the add-on actually does before trusting it with a prompt library.

Gemini Ultimate Organizer is the one entry here that only works with Gemini. Its listing says it "transforms Google Gemini into a professional workspace" with unified folders for chats and prompts, pinning, highlights, and export to Markdown, PDF or JSON. If Gemini is your main tool and none of the ChatGPT-first add-ons above apply to you, this is the narrower, purpose-built option.

Prompt Builder for AI is the simplest tool in the table: custom text buttons that insert a saved snippet into any text field with one click, described in its own listing as built to "simplify and speed up the process of creating prompts". No sync, no templates with variables, just a click-to-insert list. That simplicity is also why the two-year-old build is more forgivable here than it would be for something reading ChatGPT's DOM more deeply.

TeamPrompt belongs in a category of its own: a shared prompt library across ChatGPT, Claude, Gemini, Copilot and Perplexity, paired with real-time scanning that blocks a prompt containing what looks like a password, API key or customer record before it reaches any model. Its listing calls itself "the only extension that combines prompt management with real-time data loss prevention", built for healthcare, legal, finance and government teams. It is new relative to the others here, so treat it as a differentiated option to watch rather than a proven one.

Which of these add-ons rewrite a rough prompt before you send it?

Three add-ons are built around enhancement rather than storage, plus Prompt Architects, which does both.

AI Prompt Enhance works entirely offline using 300 built-in templates across six modes, including an "Expert Prompt" mode that its listing says applies Chain-of-Thought, ReAct, CO-STAR and Tree-of-Thought frameworks, plus a separate "Coding Architect" mode for production-ready code prompts. It can optionally call an AI provider you supply a key for, but by default nothing leaves your device: the listing states the built-in templates run "entirely on your device" with no data collection.

MetaPrompt takes a similar approach with a smaller scope: it "acts as your personal Prompt Engineer" for ChatGPT, Claude and Gemini, and adds a second mode aimed at rewriting rough notes into polished LinkedIn or Instagram messages on any site you allow-list. Its built-in templates also work offline; a free Google AI Studio key unlocks a second, more capable rewriting pass if you want it.

Prompt Architects is the entry we publish this blog for, so read the rest of this table with that in mind rather than taking our word for it over anyone else's. The listing's own pitch is that it helps you "turn vague ideas into structured, high-performance prompts", delivered through a sidebar inside ChatGPT, Claude and Gemini, with Refine, Shorten and Tone Selector modes, a personal prompt library, history, and tags. It has been live on Firefox since May 2026 and sits at version 1.7.1 as of this writing. Enhancement past the free daily limit requires an active plan; the free tier and the extension install itself do not.

Prompt Blaze does not fit neatly into either category. It is a right-click automation tool: select text on any page, run a saved prompt against it instantly, and chain multiple prompts together into a multi-step workflow across Claude, ChatGPT, Perplexity or a locally hosted model through Open WebUI. Its own listing states plainly: "Prompt Blaze is NOT free to use and requires a paid account." That is a rarer thing to see stated this directly in this category. It is also the most recently updated add-on in this entire table, shipping the day before we checked.

Here is a rough prompt you can paste into any of the enhancer add-ons above to see what "enhancement" actually changes, since a listing's description is not the same as watching the transformation happen:

write me something about our new pricing for the blog

A competent enhancer should return something closer to a role, a task, an output format and a length constraint, not just longer padding around the same six words. If what comes back is just a wordier version of the input with no added structure, that add-on is rewording, not enhancing. Once a library like this grows past a few dozen entries, the harder problem stops being enhancement and starts being retrieval; how to organize 1000+ ChatGPT prompts covers that stage.

What can these Firefox add-ons actually see once installed?

More or less than their own marketing copy suggests, in a few cases, and this is checkable directly rather than taken on trust. Every listing on addons.mozilla.org exposes the exact permissions its reviewed build declared, plus the date Mozilla completed that review, which is the "last updated" date in the table above. What differs sharply is how much of the browser each add-on's manifest actually asks to touch.

Gemini Ultimate Organizer declares the narrowest reach of the group: storage plus the single host permission https://gemini.google.com/*. It cannot act on a page unless that page is Gemini, which matches its Gemini-only positioning exactly.

AI Prompt Genius declares no host permissions at all, just storage, activeTab, scripting and alarms. activeTab means it can only act on the tab you are already looking at when you invoke it, rather than holding standing access to every open tab, which is the more conservative of the two common patterns here. Prompt Blaze follows the same pattern: an empty host-permissions list plus activeTab and scripting, so the named sites in its listing (ChatGPT, Claude, Perplexity, Poe, Grok, Gemini) describe where its features are designed to run, not permanent access to those domains.

AI Prompt Enhance and TeamPrompt both declare a long, specific list of named AI platforms and provider APIs, matching what their listings claim. AI Prompt Enhance's manifest names ten separate API and chat domains, from api.anthropic.com to kimi.moonshot.cn, consistent with a tool built to plug into whichever provider you supply a key for.

MetaPrompt and Prompt Builder for AI both declare <all_urls>, meaning their manifest asks for access to every site you visit, not only the AI platforms named in the listing text. For MetaPrompt that maps to the LinkedIn and Instagram rewriting feature its own listing describes; for Prompt Builder for AI it maps to inserting a saved snippet into any text field on any page. Neither is automatically a problem, since both features genuinely need that reach, but it is a materially larger grant than an add-on that names one domain and stops there.

Superpower ChatGPT is worth a specific flag: alongside its named ChatGPT domains, its manifest also declares https://claude.ai/* as a host permission, even though the listing text describes it only as a ChatGPT extension and names no Claude feature anywhere. That could be an unused legacy permission or an undocumented capability; we could not resolve which from the public listing, so we are reporting the discrepancy rather than guessing at it.

Prompt Architects' own manifest requests a considerably longer list of sites than this add-on's Firefox summary names. Beyond ChatGPT, Claude and Gemini, it also covers Grok, Perplexity, Kimi, Google AI Studio, Gemini Notebook, Midjourney, Runway, Canva's AI tools, Bolt, v0, Base44, Merlin and Writingmate. That is closer to the wider platform list the parent site claims than the three-platform description in this specific Firefox listing's own text suggests.

How do you tell two similarly named Firefox add-ons apart before installing?

By the slug in the URL and the publisher name, not the title in a search result.

Which Firefox add-on should you actually install?

• You live entirely in ChatGPT and want the deepest feature set: Superpower ChatGPT. Folders, search, a public prompt library and a built-in optimizer, all in one ChatGPT-only add-on.
• Your prompts cannot leave your machine and you want them rewritten, not just stored: AI Prompt Enhance. Works fully offline with 300 templates and no account.
• You use more than one model and want one prompt library across all of them: Prompt Architects or TeamPrompt, depending on whether you are one person or a team that needs shared prompts with data-loss scanning.
• Gemini is your main tool and the ChatGPT-first options above do not apply: Gemini Ultimate Organizer.
• You want to run a saved prompt against page content instantly, on any site: Prompt Blaze, if the paid account fits your budget.
• You just need somewhere to click-insert a short snippet: Prompt Builder for AI, with the two-year-old build kept in mind.

None of this is a verdict on quality relative to Chrome. It is a narrower field, verified against the store that actually hosts it. For the Chrome-side version of this same exercise, all twelve extensions we checked there are in Best AI Prompt Manager Extensions in 2026, and the Edge-specific version is in Best Microsoft Edge Extensions for ChatGPT and Copilot.