It struggles to mark stuff. It can mark 032.005 Rx but not 033.124 Temp3Tx. If I just set 033.124 it can mark so I guess blankspace can break it or something.

Long ago this was a very stable and excellent program . . . not so much anymore. I have tried running this on Chrome, Firefox and Edge and the same thing happens on each browser . . . it simply stops working. I mostly use it on titantv.com to highlight favorite programs. It's just not stable anymore. It will hold the words for a little while and then suddenly they're all gone again. This is too bad, because it "was" a great program. Anyone know of a similar program?

It was great addon (and it still is) up to v4.9 for my Firefox 56.0.2. After that release all next releases are crap - they are completely not working in the same Firefox 56.0.2. After updating of this addon all my lists of words are gone. I click on + to add a words - and nothing happens. Clicking on other buttons doesn't work too. Addon completely dead and mulfunctional.

I enjoyed this addon until the recent update. First of all, this is a great addon to have and did a great job highlighting the keywords. I have over 100 words through various sites to make my tasks easier.

Now to the point of why I am not satisfied with the update. All of my keywords that I set up through this addons are gone, it just poofed. It happened right after the update, I believe, was a major revision of the addon. Now, I don't remember every words and it affect my productivity greatly and made a negative impact on my workflow due to recent update. I depends heavily on HighlightThis as it is part of my productivity.

Frankly, I am disappointed with this. I am expecting a quick export of my list before pushing the update. And now it is gone, I have no way of recovering those keywords that took me a while to get it in the list.

Unfortunately, I will be uninstalling this addon. It take too much work for me to put the list back. What is worse is that my memory is not that great, that means I can't even remember the key words that I set it up in the addon including the websites.

I was super happy with this addon. Virtually indespensible if I made money I would donate. Except now, after the last update, I can no longer copy and paste a list of words because he switched it from a text box to a "check mark bullet list" so it doesn't work for me anymore so I'm uninstalling it now because I can't get the pastebin link to work either. I definitely can't insert 4000 check mark bullet list words. I was using other programs to generate my list of words and just copying and pasting the result every time I needed to update.

great idea but it has bugs , it stops working!

Worked great until Firefox 68.0.2 - now it does nothing :-(


update: i've minimized the Problem - its the URL. If i use it on any website, it works. If i add a filter to use it for only one website, it doesnt work.
(Doesnt work any more, because some days ago it worked great)

Firefox 68. Don't work and hang browser tab. Used two multiple words list(more that 50 lines, japanese/korean symbols, etc). Trying with disabled other extensions, change "Highlight This" configs, still freezes tab. Nothing work, same with performance slider. This is perfect highlighter i seeks for ages, but it not work for me. Sorry, can't provide more info, BUT this extension works in chromium.

Brilliant extensions but too many bugs to be useful.