British English Dictionary not compatible !

User Help for Mozilla Firefox
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Joined: March 23rd, 2007, 4:48 am

Post Posted March 23rd, 2007, 4:53 am

Having upgraded to the new recommended Mozilla version and its addons, I'm now getting this message:

"British English Dictionary 1.19 could not be installed because it is not compatible with Firefox (British English Dictionary 1.19 will only work with Firefox versions 2.0b1 to 1.0b2)"

How do I turn Mozilla back to the previous version?

Thanks :-)


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Posts: 8775
Joined: November 5th, 2004, 11:28 am

Post Posted March 23rd, 2007, 9:58 am

The dictionary is compatible and you can install it on Firefox, there is just an error in the setup file for the extension.

A couple of methods that you can use to add the dictionary are:
Download the extension, right-click on ... +zm+tb.xpi and choose "Save Link As"
This will save the file to your hard drive, default name british_english_dictionary-1.19-fx+zm+tb.xpi

Use the methods shown at
In the article it mentions looking for a line that contains maxVersion in the file called install.rdf - In this case it occurs 3 times, you need to change the first occurrence, change 2.0b2 to 2.0.0.*
To make the extension compatible with Thunderbird 2 locate the 2nd instance of maxVersion and change 2.0b1 to 2.0.0.*
The 3rd instance of maxVersion relates to SeaMonkey, in that case you can change 1.1a to 1.1.* in order to install it in the latest version.

Another method is to manually add the dictionary.
Open the .xpi file with your file archiver (I use 7-Zip). Open the dictionaries folder within the .xpi archive and extract 2 files, en-GB.aff and en-GB.dic
Copy these 2 files to the dictionaries folder of your Firefox/Thunderbird/SeaMonkey installation, for Windows the default location is:
Firefox 2
C:\Program Files\Mozilla Firefox\dictionaries\
Thunderbird 2
C:\Program Files\Mozilla Thunderbird\dictionaries\
SeaMonkey 1.1.*
C:\Program Files\SeaMonkey\dictionaries\

Edit: See later posts in this thread for links to updated versions that you should be able to install on Firefox 2.0.0.*
2nd edit - added details of how to make extension compatible for Thunderbird 2 and SeaMonkey.
Last edited by Tony-E on April 21st, 2007, 2:31 am, edited 4 times in total.

Posts: 3
Joined: March 26th, 2007, 1:34 am

Post Posted March 26th, 2007, 3:15 am

Thanks Pedestrian - works great. I used your first method to fix this.




Post Posted March 26th, 2007, 9:48 pm

Worked for me too after a couple of tries, needed to change all maxversion to 'maxVersion>'


Post Posted March 28th, 2007, 8:16 am

Does anyone know how to get it to work on a MAC?

I tried altering the .rdf method and it appears to work as it allows you to install it - firefox say's "this addon will be installed when firefox is restarted" but you restart - it disappears - its not in the list of extensions.

Anyone help?

Posts: 1
Joined: March 28th, 2007, 1:42 pm

Post Posted March 28th, 2007, 1:52 pm

Yeah, Thanks, never noticed it was missing until 10 mins ago!

Just like to add that if you are using 7-zip the easiest way to do the edit is single click the install.rdf file & press F4, edit the line & remember to allow the update after you save it in notepad.

Another Mac User

Post Posted March 28th, 2007, 1:55 pm

Well I just tried the other method - renamed the .xpi to .zip, opened the contents and copied them to the mac location (Library/Application Support/Firefox/Profiles/.../extensions/ and restarted Firefox, but that didn't work either :(

Another Mac User

Post Posted March 28th, 2007, 2:30 pm

Editing the install.rdf worked for me. I had a problem on the mac that if I renamed the .xpi to .zip and extracted the contents, when I modified the .rdf and re-zipped it I was no longer able to install the extension. I figure the zip compression on the mac has some variation to the original .xpi. So I had to open the .xpi in Windows through parallels so that I could replace the .rdf directly in the archive without extracting and recompressing. Bingo!


Post Posted March 29th, 2007, 8:07 pm

GuestMacUser wrote:Does anyone know how to get it to work on a MAC?
Download the extension Mr Tech Local Install.

Among other things, it allows you to override the old-version restriction on extensions. As the poster Another Mac User discovered, unzipping an extension, editing it and rezipping it won't work with Macs.

Posts: 26
Joined: September 4th, 2003, 8:34 am

Post Posted March 30th, 2007, 6:40 am

Although, I accept that it is possible to install the dictionary with a bit of tweaking (which isn't a problem for me), I'm not happy with the fact that this is a problem with the latest official release of Firefox and an official dictionary. Granted, British English is not as widely used as American English but there must be a fair number of British users (10s if not 100s of thousands) that this would affect. Most of which are expecting their browser to just work and if it doesn't will just assume that Firefox is just broken.

As you pointed out, the fix is trivial. How do we ensure that it is fixed officially?


Post Posted March 30th, 2007, 7:42 am

TheWidget wrote:How do we ensure that it is fixed officially?
The problem: As far as I can ascertain,extensions (and their authors) have no more an official status with Mozilla than do you or I or the people running this board. Like them, the author of the British-dictionary extension works in a volunteer capacity. It is that author's decision whether to keep the extension current, not Mozilla's.

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Joined: July 15th, 2004, 11:13 pm
Location: Cambridge, UK

Post Posted April 2nd, 2007, 1:19 am

I have posted a version-tweaked version of the British English dictionary 1.1.9 called (MaxVersion set to 3.0) for anyone who wants to use it - works fine on my mac, for example, straight out of the box. Hope this is useful. You'll need to unzip it before using it - on a mac, it'll probably further unzip the .xpi into a folder as well, which you can delete after.

- yoxi
if it's brokenless, don't suffix it...

Posts: 12
Joined: February 26th, 2005, 11:02 am
Location: W.Sussex UK

Post Posted April 5th, 2007, 5:55 am

Thanks yoxi, that works a treat! I appreciate your efforts.


Post Posted April 8th, 2007, 4:12 pm

I suck at using computers and I haven't got a clue on how to go about any of what has been mentioned so far. I tried installing yoxi's program but it just tells me I don't have the right software to read the file. Could someone please help?


Post Posted April 8th, 2007, 4:16 pm

It's okay, I managed to work it out. I didn't realise that you had to open the file with Firefox.

**hides head in shame**

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