Thank you for your detailed feedback!
I'm glad you appreciate the lack of word limits in Multi Find.
I'm continuously working on improving the extension, and your input is invaluable.
I'm aware of the slowdown issue with many words (and long webpages) and am exploring ways to optimize performance (v1.81 should already be faster than v1.80, and you can try to set diacritic sensitiveness *on* to speed up even more).
The reason why there are no different settings per site is that the extension is not aware of the navigation URL, for confidentiality issue. There is for now no plan to change that but the different word lists are on my radar instead. I hope to add this feature in a future update. Thanks for your support and patience!

Thank you for your review and remarks.
I will try to add the option to have no highlight at all in the settings (none/regular/soft glow).
Regarding your second point, unfortunately, I tested this same website, and I did not see any issue with the highlights. I would appreciate if you could, please, send a screenshot to info(at)vgreco(dot)fr
[EDIT 30/09/2024] version 1.83 can now have the highlight style set to none (go in the display options via the cogwheel) and still be able to count and select the searched words.

Thank you very much for your review.

Regarding your request, I might introduce wildcard characters in the future, allowing you to separate different words. However, I'm afraid the search won't be able to span across different paragraphs. Stay tuned.

Thank you for your feedback!
Regarding the horizontal scrolling, the extension does not currently support a horizontal scrollbar because most search expressions fit within the window's width. However, I will consider ways to improve this (larger window or horizontal scrollbar).
[EDIT] Horizontal scrollbar added in version 1.74.
As for the search window not closing when clicking on the webpage, this feature was added recently due to user requests for a persistent window. You can revert to the previous behavior by disabling the "persistent search window" option in the display settings (click the cogwheel).

Thank you for your review and suggestions.
I'm sorry to hear about the slowdown issues you're experiencing. I will see what I can do to improve the speed (but is highly depends on the length of the word list and the webpage).
For the profile feature, the upcoming support for multiple keyword lists should address your needs. Stay tuned.
Regarding the color-coding for specific keywords, I'll see what can be done to implement this feature. [EDIT] Version 1.80 introduced color choices for individual words (and a faster search window).
Thank you again for your feedback!

Thank you for your positive feedback and your patience. I apologize for any inconvenience caused by the colour issue, and I am pleased to hear that reinstalling the extension resolved the problem for you.

Version 1.60 introduced the dark theme, this is probably what you were seeing. The theme can be changed in the display settings (default is "system").
At this same place, you can choose the sub-range of colours to be used. It is not very intuitive: you have to click first on the first colour of the sub-range and then on the last colour of the sub-range (click on the first cell and then on the last one to retrieve the default settings).
Thank you for using Multi Find!

Thank you so much for your enthusiastic feedback! I'm thrilled to hear that this extension has been a game-changer for you.
Regarding your suggestion, and I'll definitely look into it.
I appreciate your support and I'm happy to share that a premium version with additional features will be available next year, so there's no need to donate for now.
Stay tuned for the updates, and thanks again for your fantastic support!

Thanks a lot. A new version is about to be released: I am convinced you will love the new features!

From version 1.70 you can edit all the highlight colors, including the dark mode ones. Feel free to make them brighter.

Thank you for the review, and I'm glad that you like the addon.
Regarding the keyboard shortcuts, it is difficult to find one that suits everybody. But the good news is that you can change it. Type "about:addons" in the address bar, then click on the cogwheel and choose "Manage Extension Shortcuts" in the menu. You can then change the key combination to anything you like.

Thank you for for using Multi Find and for your feedback: I am glad to hear that this extension has been helpful for your academic work.
To answer your concerns:
- Unfortunately, regarding the support of PDF, I am afraid this is too complex for this extension (basically I would have to re-write a PDF-viewer). A possible workaround is to convert the PDF into an HTML page.
- I understand the standard selection white highlight masking the extension colored highlight can be disturbing, but it is important to distinguish the current selected word while jumping from one occurrence to the next one, in case several of them are on the same line, for instance.
- And I appreciate your suggestion of the broader search with a random middle part: I will certainly consider implementing a joker/wildcard character in the future.
Thank you again for your support, and please keep checking for updates!

Edit: with the version 1.40 (Oct. 13), you can now activate the soft glow highlights: the color of the highlighs should still be visible even if you select the text.