Terrible. Zero stars. No only does it NOT WORK, but it blanks-out all the text in 'options'.
Does Mozilla bother to read these reviews & fix their damned software? No. Thought not!

Added to Firefox,restart and Facebook is still in ridiculous American English !

Not working or showing up, even while I have it installed.

I cannot get get spell check on yahoo mail

Does not work AT ALL ! English does not even appear in the list of available languages to be used... (English US the same, btw).

This must be the WORST English language pack around, maybe created by a NON English.
Lost of worths missing even my 5 year old daughter can do better.

Strangely, it installs but does not show up on the right-click context menu of available languages.

Have tried several times and, like so many others have said, it doesn't work! We are in the UK and are stuck with US spelling and keyboard - can't find the pound symbol, @ is in the wrong place, etc etc! PLEASE fix this...

https://addons.mozilla.org/firefox/downloads/file/1005504/english_gb_language_pack-61.0buildid20180704003137-fx.xpi?src=dp-btn-primary redirects to https://addons.mozilla.org/en-GB/firefox/addon/english-gb-language-pack/ so the language pack cannot be installed.

Its does not works

Doesn't work !

does FF not read this?? .
this is not taking your users very seriously, reading the many 1-star ratings all with the same reason:
IT DOES NOT WORK ;((((((

Tells me my version of FF is too old even though I've just installed the latest version

It does not appear to work, now whether this is a fault of Gmail (yuk I hate it but that's what the company uses) or not I don't know, when typing words in to Gmail where it expects a "z" and I use an "s" I get a spelling error.

Doesn't work !

Although I live in London, UK, I cannot access this package. I'm stuck with the annoying spelling of the US version.

I'm in uk and can't use GB language add-on? Really!?!?

nie działa angielski, english language does`t work

It is not clear that this package is not for spellchecking

does not work ; english does not appear in the choice of languages for correcting the text

Not possible to install it, cause you *have to update your browser*. But in fact, when you have already updated it, you still got nothing.

Tried to add the English (English - UK) dictionary, I got a message stating that I needed the latest version of Firefox to install it, so I downloaded the latest version, double clicked to run it, it installed, but it still won't let me install the English dictionary. I would have liked to give it zero stars because it doesn't work.

Une fois installé, la langue n'est pas proposée. ne fonctionne donc pas (version Version 59.0.2)

Can't select dictionary once it's installed