Multi Find: Search, Highlight, Explore is a Firefox add-on that allows you to smoothly search and highlight specific fragments, words, or phrases within any webpage. It is Unicode-friendly and works on various webpages, including blogs and forums. The latest version includes features such as displaying the number of occurrences, navigation buttons, and a toggle button to show/hide scrollbar marks.
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Multi Find allows you to smoothly search and highlight fragments, words or phrases within any webpage.
Multi Find is Unicode-friendly: it can handle non-English characters (Chinese, Japanese etc.) and special symbols. You can also turn on and off case or diacritic sensitiveness. It works on iframes and dynamically loaded content (regular webpage but also blogs, forums and even video subtitles).
What you see in the input box is what you get in the webpage, as the input box is formatted exactly like the result of the highlighting. An addition, the list of words can be manipulated through a toolbar.
Other notable features of Multi Find:
Four ways to fill the input box: by directly typing into it, by copying and pasting, by loading a text file or by selecting a word on the webpage and using the contextual menu (right-click).
Persistant list of words across different tabs, browser windows, and future sessions (local storage only, nothing is in the cloud)
Number of occurrences for each searched word and the total count
Navigation buttons to scroll through the occurrences of highlighted words
Scrollbar marks to easily locate the highlighted words within the page
Full customization of the interface (including dark theme) through persistent settings.
User reviews
On some websites, like ebay, the multi-find window is under some of the website UI elements.
Also, there doesn't seem to be a way to launch it with a keyboard shortcut. You have to click the addon's button, which by default requires first clicking on Firefox's addon menu.
Otherwise, seems to work well.
There are some advantages, but overall, it doesn't yet measure up to the "Auto Highlight" extension, which has many more features. The main advantage: I didn't find any word limit here, while in "Auto Highlight" it is limited by Firefox Sync capabilities. Main disadvantages: it slows down with a large number of words; settings reset and don't save immediately, you have to change them several times before they are saved; no settings for different sites; no creation of different word lists; and so on. Overall, a decent extension, I hope it will develop to the level of "Auto Highlight" but with its own features.