How can I get rid of spellchecker dictionaries in Firefox?

edit

I removed hunspell-en with dnf

dnf remove hunspell-en

This also removed hunspell-en-GB as a dependency

Next I installed hunspell-en-GB again

dnf install hunspell-en-GB

see below all the details:

rpm -qa hunspell\* langpacks\*
langpacks-en-1.0-8.fc25.noarch
hunspell-en-0.20140811.1-5.fc24.noarch
hunspell-1.4.1-2.fc25.x86_64
hunspell-en-US-0.20140811.1-5.fc24.noarch
hunspell-en-GB-0.20140811.1-5.fc24.noarch
[root@nyx myspell]# dnf info hunspell-en-US-0.20140811.1-5.fc24.noarch
Last metadata expiration check: 2:50:41 ago on Sun Jun  4 10:47:12 2017.
Installed Packages
Name        : hunspell-en-US
Arch        : noarch
Epoch       : 0
Version     : 0.20140811.1
Release     : 5.fc24
Size        : 544 k
Repo        : @System
From repo   : anaconda
Summary     : US English hunspell dictionaries
URL         : http://wordlist.sourceforge.net/
License     : LGPLv2+ and LGPLv2 and BSD
Description : US English hunspell dictionaries

[root@nyx myspell]# dnf info hunspell-en-0.20140811.1-5.fc24.noarch
Last metadata expiration check: 2:50:52 ago on Sun Jun  4 10:47:12 2017.
Installed Packages
Name        : hunspell-en
Arch        : noarch
Epoch       : 0
Version     : 0.20140811.1
Release     : 5.fc24
Size        : 545 k
Repo        : @System
From repo   : anaconda
Summary     : English hunspell dictionaries
URL         : http://wordlist.sourceforge.net/
License     : LGPLv2+ and LGPLv2 and BSD
Description : English (US, UK, etc.) hunspell dictionaries

[root@nyx myspell]# dnf remove hunspell-en
Dependencies resolved.
==============================================================================================================================================================================================
 Package                                        Arch                                   Version                                                Repository                                 Size
==============================================================================================================================================================================================
Removing:
 hunspell-en                                    noarch                                 0.20140811.1-5.fc24                                    @anaconda                                 545 k
 hunspell-en-GB                                 noarch                                 0.20140811.1-5.fc24                                    @anaconda                                 543 k

Transaction Summary
==============================================================================================================================================================================================
Remove  2 Packages

Installed size: 1.1 M
Is this ok [y/N]: y
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
  Erasing     : hunspell-en-0.20140811.1-5.fc24.noarch                                                                                                                                    1/2 
  Erasing     : hunspell-en-GB-0.20140811.1-5.fc24.noarch                                                                                                                                 2/2 
  Verifying   : hunspell-en-0.20140811.1-5.fc24.noarch                                                                                                                                    1/2 
  Verifying   : hunspell-en-GB-0.20140811.1-5.fc24.noarch                                                                                                                                 2/2 

Removed:
  hunspell-en.noarch 0.20140811.1-5.fc24                                                       hunspell-en-GB.noarch 0.20140811.1-5.fc24                                                      

Complete!
[root@nyx myspell]# dnf install hunspell-en-GB
Last metadata expiration check: 2:51:39 ago on Sun Jun  4 10:47:12 2017.
Dependencies resolved.
==============================================================================================================================================================================================
 Package                                         Arch                                    Version                                                Repository                               Size
==============================================================================================================================================================================================
Installing:
 hunspell-en-GB                                  noarch                                  0.20140811.1-5.fc24                                    fedora                                  244 k

Transaction Summary
==============================================================================================================================================================================================
Install  1 Package

Total download size: 244 k
Installed size: 543 k
Is this ok [y/N]: y
Downloading Packages:
hunspell-en-GB-0.20140811.1-5.fc24.noarch.rpm                                                                                                                 1.3 MB/s | 244 kB     00:00    
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total                                                                                                                                                         222 kB/s | 244 kB     00:01     
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
  Installing  : hunspell-en-GB-0.20140811.1-5.fc24.noarch                                                                                                                                 1/1 
  Verifying   : hunspell-en-GB-0.20140811.1-5.fc24.noarch                                                                                                                                 1/1 

Installed:
  hunspell-en-GB.noarch 0.20140811.1-5.fc24                                                                                                                                                   

Complete!
[root@nyx myspell]# rpm -qa hunspell\* langpacks\*
hunspell-en-GB-0.20140811.1-5.fc24.noarch
langpacks-en-1.0-8.fc25.noarch
hunspell-1.4.1-2.fc25.x86_64
hunspell-en-US-0.20140811.1-5.fc24.noarch

I use my script removedictssymbol_links.sh

(cd /usr/share/myspell; find -type l -exec rm {} \;)

you need run it every time you got an hunspell-en update , hopefully usually just happens on upgrades.

I created an issue in Bugzilla for this: https://bugzilla.redhat.com/show_bug....