Doesn't work ! Rated 1 out of 5 stars

I have installed the plugin, get the button in "customize" click on the button... No reaction.

I have uninstalled and reinstalled the plugin. Now i have no button in "customize"... :-(

The button doesn't do anything unless you define some substitutions in the options (you can access them from the little down arrow in the right of the button). I don't know why you don't see the button now, though.

When is the button being fixed? Rated 4 out of 5 stars

Considering the way I use this program...frequently turning it on and off...I find it almost unusable without the button working! When is the button getting fixed!?

This user has a previous review of this add-on.

If you mean that the button is not appearing, then it's a weird problem that happens to some users but not others. I don't know what is the source of the problem, there are some possible fixes that have worked for other users:

1. Restart Firefox
2. Uninstall and then install again FoxReplace (maybe with a Firefox restart in between to be sure)
3. As a last resort, use the "Restore defaults" button in the Customize menu

In some cases it has been fixed with option 2 and in others with option 3.

new version works better with e10s Rated 5 out of 5 stars

in the new version I can enable the auto replace option and the webpages dont lock up.
thanks to e10s.
and thanks to you for making it e10s compatible

This user has a previous review of this add-on.

Wonderful tool, one flaw Rated 5 out of 5 stars

I use this extensively to replace military and scientific acronyms with plain meanings, among other uses, and it makes my work so much easier.

I must concur with a previous review that--recently, (perhaps due to a Firefox update, perhaps not)--on Firefox start or restart the icon does indeed disappear and is nowhere to be found. The only way to make it appear again is to go to Firefox "Customize" and "Restore Defaults" which means I have to tediously put *all* my Firefox addons' icons back where they belong. Every. Single. Startup.

Uninstalling and re-installing the addon does *not* cause the icon to reappear, even in the "Customize" screen--unless I click "Restore Defaults." Disable addon, restart Firefox, enable addon, and permutations thereof, similarly fail to reveal the icon. Anywhere. This means that--without a visible icon--the only way to access the "Preferences" window, or to enable/disable text replacement, is to click FoxReplace "Preferences" in the Firefox "Addons" screen.

I use Firefox 54.0-1, 64-bit--the most recent version for Arch Linux.

Three stars with this maddening flaw, five stars if it is ever fixed.

UPDATE: The developer, Marc, responded promptly, and pointed out that there is a FoxReplace Menu option in the Firefox "Tools" menu, (which I failed to notice as my Tools menu is extensive and rarely used). As this has the same functionality as the icon, and is easily accessible, I will give the addon the five stars it deserves.

Thank you, Marc, for your hard work on this addon.

I you have to do it every time you start Firefox then it's a lot worse than I thought. Sorry for this problem.

I don't know which is the cause of the problem since it has not happened to me in any computer. The thing that has changed is that previously it was created statically and now it's created dynamically. This is just one step in the path to switching to WebExtensions, the only thing that will work since Firefox 57, planned for November. The way that the button is created will change again soon, when it is created directly with WebExtensions. I hope the problem will not happen anymore then.

On a side note, there is another way to access the things in the toolbar button: there is a FoxReplace submenu under the Tools menu which has the same items. It's less accessible than the toolbar button but more than the Preferences button in the Addons screen.

What did you update this one at 20.june? please return before version! Rated 1 out of 5 stars

It suddenly stopped working properly since this addon was last updated.
· FoxReplace icon disappeared from the browser
· When loading a page, words and phrases before replacement are displayed for a moment are displayed

I do not know what was blown out and made such a strange update, but since it is inconvenient to use, please return.



The last update was necessary to be multiprocess compatible. It was also the first step to continue to work in Firefox 57, but at least two more updates will be required for this, and bigger changes will be made.

I don't know why the icon disappeared, but you should be able to add it again. And regarding the other issue, it also happened with previous versions for some users; I will try to improve it in later versions.

Sorry for the inconveniences at the moment.

Does what it says, lightweight, just one nit to pick... Rated 4 out of 5 stars

I like the fact there's a lot more that can be done other than simple word replacement, and that it's (like it should be) very lightweight. However (and likely this has been mentioned before, but I just couldn't bother to search the reviews), there's a check box at the bottom that I can't read because the window's just a leeetle too small to fit it, and the program window size is not adjustable- so while I can check or un-check the box, I have no idea what it's for ;)

This review is for a previous version of the add-on (0.17.3). 

There's one trick: the window is not resizable if you open it from the options button in the addons manager, but if you open it from Tools -> FoxReplace -> Options or from the toolbar button then it's resizable.

Works like a magic Rated 5 out of 5 stars

One micro-remark is about html-replacing mode: it's not clear whether it's possible to do multi-line matching with dot. For instance, <sometag>.*<\/sometag> doesn't match multi-line contents for me.

In typical regex there exist directives that do that, but not clear whether they are somehow supported here.

edit: found a trick to solve this with <sometag>[^]*<\/sometag>. Only dot is killed by multi-line in regex, all other patterns work well.

This review is for a previous version of the add-on (0.17.3). 

A suggestion to add a temporary freeze Rated 5 out of 5 stars

Sometimes there is a need to see a page in it's original state. Now you need dozens of clicks to do that and to revert back afterwards (through changing addon options). Or another way is by enabling-disabling addon which takes less clicks, but more time, cause you need a restart.

So solution could be to add some shortcut to activate/deactivate substitutions. Or as almost same, to turn-off/on on-load trigger.

EDIT: thank you for the answer. Button wasn't added automatically, but I found it now through "customize" mode. This way is really 5-10 times more efficient, thanks!

This review is for a previous version of the add-on (0.17.3).  This user has a previous review of this add-on.

There's a toolbar button with a menu with an option to toggle the onload trigger. That's 2 or 3 clicks to change the setting depending on whether you put the button directly in the toolbar or under the 3-line menu.

Best Rated 5 out of 5 stars

It's very helpful to me and i like it.
If it has feature to organize words it would be great as my list has more than 500 words, and every time i have to click to move word up and down

This review is for a previous version of the add-on (0.17.3). 

Works really well Rated 4 out of 5 stars

This works really well, if you know what you are doing with HTML. But you have to check some options that are not checked by default in order to get it to work. I've already been highlighting users on Ebay that have lost my shipments, and the Pastebin now sizes to my browser window width.

Also "Import from URL" doesn't work for me. I made an issue on Github.

This review is for a previous version of the add-on (0.17.3).  This user has a previous review of this add-on.

For all users Rated 4 out of 5 stars

Small tip: Because this addon lacks proper documentation, here a power user tip: press F9 to activate the replace-toolbar :)

This review is for a previous version of the add-on (0.17.3). 

Seems to be working but ... Rated 2 out of 5 stars

I hoped to find something like privoxy as addon but it is not working the same way. Foxreplace seems to changing source of web page (at least view source shows changes) but the changes are made to late. So all scripts are already loaded.

This review is for a previous version of the add-on (0.17.3). 

Works Perfectly Rated 4 out of 5 stars

More fun than it probably should be. Got a (not) favourite forum troll? Or political candidate? Take childish delight in replacing their name with something suitably silly and demeaning. Or make your everyday reading less annoying by replacing words and phrases. Remove rude words. Or make them appear instead of euphemisms. An excellent tool to customise your online experience.

This review is for a previous version of the add-on (0.17.3). 

Doesn't work. Rated 1 out of 5 stars

Nothing gets replaced. It doesn't seem to do anything at all.

This review is for a previous version of the add-on (0.17.3). 

What are you trying to do? Which versions of Firefox and FoxReplace are you using? You should open an issue at if you have a problem.

Was working great. But now slows down certain pages. Rated 3 out of 5 stars

Especially on, FoxReplace will use so many resources that the page will hesitate for a second or two everytime I try to scroll, select text or type in a text box. There is even a delay when attempting to switch away from the tab of the problematic page. As a test, I disabled all add-ons, and the issue goes away. I restored the add-ons one-by-one and the issue only returns when FoxReplace is re-enabled. In another test, when I exclude the problematic page in the URL list - in this case with, the issue also goes away. But of course, IMDB is where I want FoxReplace to work as best as possible.

This review is for a previous version of the add-on (0.17.3). 

Maybe you have enabled periodic substitutions? Can you open a new issue at to try to research the problem?

Rated 5 out of 5 stars

This a great but potentially dangerous add-on as I'm sure other people wouldn't take too kindly to you "misreading" what they actually typed xD Aside from that, it's awesome; thanks!

This review is for a previous version of the add-on (0.17.3). 

It's used to be perfect, but... Rated 4 out of 5 stars

I love this addon because i can censor many word that i don't like. But since the 0.17.2 update, some words in mobile version of facebook website and in texbox remain uncensored and it's not good. So please fix them so I can surf without any bad words

This review is for a previous version of the add-on (0.17.2). 

Indispensable Rated 5 out of 5 stars

So nice to be able to get rid of things like 'Just Sayin', changing things like 'totes' to 'totally', 'sorry not sorry' to 'sorry', and best of all goofy personalizations like.. changing 'Walmart' to 'The Zoo'. Awesome addon.

This review is for a previous version of the add-on ( 

Best buy/Walmart/target #*$'$ PRICEMATCHING? Rated 5 out of 5 stars

Just a thought.. this could be the end to the box stores providing price matching services... None the less... Super app! Don't believe anyone else has done this on the mobile platforms as of yet.
Thumbs up to the dev.


This review is for a previous version of the add-on ( 

A Must-Have for Political Campaign Season Rated 5 out of 5 stars

I see a lot of comments touting practical uses for this add-on, but it has some santiy-restoring humorous applications, too. Give all your least favorite politicians snarky nicknames! It makes reading the news a little more entertaining.

This review is for a previous version of the add-on (