Summarization is great and so is translation. With the right prompt this extension is so so much better. The free tier of Gemini 2.5 Thinking on is good enough for concise and understandable summarization and translation.

Feature Requests:
1. Adding the option to read aloud the summarization in the extension pop out would be great.
2. Adding the ability to ask follow up questions in the extension pop out would be so much more convenient than having to open the summary in a new window.
3. Allowing the summary to save in cache so that it doesn't go away when the user clicks away from the tab for a prolonged period of time, causing the user to have to regenerate the summary.

My customized prompt, that is great in my opinion, for those who want a better summarization:

Role: Act as a professional editor and expert translator.

Task: > 1. Translate: If the provided text is not in English, translate the core meaning accurately into English, maintaining a professional tone.
2. Summarize: Create a comprehensive summary that captures the main thesis, supporting arguments, and the author's intent.
3. Structure: > * Executive Overview: A 2-3 sentence paragraph explaining the "big picture."

Key Themes: Use 3-4 subheadings to break down the primary sections or arguments of the text.

TL;DR: At the very bottom, provide a section titled "Critical Bullet Points" containing the 5 most essential takeaways.

Constraints: > * Avoid corporate jargon or "filler" phrases.

Ensure the translation feels natural, not literal.

Maintain the original sentiment and urgency of the text.

Made an account just to rate this 5/5

ワンクリックで要約してくれる最高のアプリだったがgeminiのアプデに伴ってか動画の要約が機能せず、ページの予約しかできなくなった・・・。開発者さん！頼む！あなただけが頼りだ！
要約できるようにしてくれてありがとう！！！今の時点でも最高のアプリだけどカスタムオプションの１,２,３がオプションからでなくアイコンクリックしたときに出てくるウィンドウから選択できたらもっと最高だ！！！2025/12/29

great extension, but I wish the content overflow would be fixed when using the large font size in mobile devices

This is the best open source AI summarizer on Firefox for sure!

My 2 suggestions would be that at least on youtube the extension get embedded to the right side of the page. Secondly support for youtube timestamp hyperlinks on youtube videos. I can get gemini to spit out summaries of sections with timestamps appropriately but it'd be nice if the extension auto converted them to timestamp hyperlinks you could actually click on.

Regardless, great extension!

Youtubeのキャプションを拾って要約/翻訳してくれるのが非常に便利でありがたい。
モバイルでは Kiwi Browserからしか有効にできないかと思っていたが、Firefox版があるのを昨日の発表で知りました。
なお、ダークモードだとオプションの入力枠が見にくいかもしれないことに気が付きました。

This is the best AI summary extension that I have found. Instantly has context on the page you use it on, and the ability to write custom prompts is perfect.

Developer I hope you read this because there is one problem: For the Custom Prompts 1-3, when clicking on them after clicking on the extension toolbar nothing happens. The custom prompt only works if you set it as the default. If this can be fixed that would be amazing!

Excellent module de résumé et traduction de page utilisant sur l'IA de Google en laissant le choix des modèles. La configuration de l'API est à faire mais c'est très pratique une fois configuré.

好使

An excellent, fast, and customisable extension! Highly recommended!
At first I was getting "Error: 1000", turns out this was because my custom Windows hosts file was blocking some Google Cloud domains. This can be fixed by removing those domains from hosts or turning on DNS Over HTTPS, after doing this the error went away and the extension works perfectly!

点击“打开选项页”没有反应，无法设置apikey，不能使用。不清楚是否有兼容性问题，我使用的浏览器版本firefox115.12.0esr (64 位)

documentation re: custom actions popup would be appreciated...found it in the reviews. Otherwise it works magnificently and I'm excited to use this tool!

whether can you develop a new function:
like an add-on called "划词翻译"，which can automatically display the translated words without clicking the icon of your add-on or use "alt+G" key？

Doesn't work out of the box. Summaries produce a general 403 error instead of prompting the user to get an API key or what to do next.

Checking the options, the first section is an empty field for a Gemini API key and "You can obtain a Gemini API Key at the following page..." with a link. Except that's NOT where you get API keys, it's a hype page. Pretty sure you get them at aistudio, a completely different site.

Some SERIOUS ux issues to work out here.

Absolutely fantastic.

Simple, yet very straightforward and useful addon. I am happy to share with you a resarch prompt which I'm using with it almost every day. Thank you Sadao for your work.

katb.in/sumprompt

pretty handy. Thanks

You have to get Gemini API key and that may put you off at the first glance, but the step is well described and actually easy to follow. Very useful once you set it up. It will save so much time for you. First, because Gemini is state-of-art model with estimated IQ score well above 86th percentile as of now, it does good quality job that actually is useful. Second, not only you can get summaries and translations, you can use custom prompt option to summarize AND translate it at one go. You can even make it output in style of rap lyrics, if you are so inclined, and later ask it to change the lyrics into poems. The imagination and your ability to write a good prompt will be your ceiling here.

Not perfect and user friendly but save much time for reading and studying if you TRY IT ;)