FoxReplace rocks. Been using it for about 11 years. People online grow dumber and more aggravating every year but this add-on keeps their crap off the screen, easily and reliably.

Simple clear and easy to use so far. Search and replace text, it does what is says. Haven't done extensive testing to see if there are any issues as others have reported, but has been pretty solid for me.

What is the privacy policy of this add-on? Will change the rating to 5 if addon is privacy-respecting.

So far so good. I managed to make it work from options, but no thanks to the explanations of the author, which are non-existent, and the interface is also not intuitive. There is still a thing or two that I don't get, but I don't need it for now. For example the auto/auto-manual/manual stuff (I've put "auto" and it seems to work for what I want, but not clear what the other options do). Also the HTML output only/input&output; I have no clue what it means. Finally, the URLs to be typed. What does that do? Also right click and paste works only if you start typing something in a blued field, delete that and then paste.
A short (and good) explanation would be necessary.

Makes the internet more bearable for me.

edit:
The extension seems to disable itself anytime I restart Firefox. Is there any way to fix this?

This is a very simple application. It mostly does what I needed. To simply replace every instance of WORD with OTHERWORD, while viewing/reading web pages. Well done.

Suggestions for future updates.

1. Allow more than 1 word to be replaced, although, this may be possible already, and I'm simply ignorant of the ability/syntax (ie. comma separated, etc)

2. When I toggle Reader mode, the app does not replace the text within the web page. Having the same functionality in reader mode, would be useful and a common use case, I believe.

Thanks!

Literally makes the internet tolerable

'Potentially' the best add-on since Ublock Origin.
Now I can read pages in English, as opposed to the Universal State of Ambiguity that's rapidly replacing it!

Unfortunately, it's messing-up script-related (js) content.
Eg, Changing text/formatting colours, preventing js-related images, videos, etc. from rendering.

Finding more wrong with it as time goes by. It's becoming more annoying than the cause of the problems I installed it to remedy.

We could also do with the option to exclude specific domains.

Some clear and concise usage instruction would also be a welcomed addition.

Once the developer has finished the plug-in and fixed all the outstanding faults, I will compile a downloadable list to enable automatic US-American to English translation.

Due to the above issues, I have downgraded it to 3 until further improvements are made.
:-(

很好用的扩展，帮助挺多的呢

Great add-on!
I wish there was an application of substitutions on page change. The number of websites that don't reload pages is growing (YouTube, Amazon, etc.), so it's becoming a nuisance.
Also, dark theme would be highly appreciated.

Very very good, you can use an * in the menu for selecting which URLs replacements apply to

卓越された文字置き換えアドオン。
不愉快なワードを見えなくすることも出来るし、
ライティングの置き換えツールとしても重宝している。
また、ページ読み込み時にワードを自動的に置き換えしてくれる面でもText formerよりも優れているかと。