Important Notice: We're experiencing email notification issues. If you've posted a question in the community forums recently, please check your profile manually for responses while we're working to fix this.

Avatar for Username

Sykje yn Support

Mij stipescams. Wy sille jo nea freegje in telefoannûmer te beljen, der in sms nei ta te stjoeren of persoanlike gegevens te dielen. Meld fertochte aktiviteit mei de opsje ‘Misbrûk melde’.

Mear ynfo

Dizze konversaasje is argivearre. Stel in nije fraach as jo help nedich hawwe.

The mailto application for Quantum is missing from the list in Tools>Options>Applications. How do I get it back?

kenkahn
kenkahn
more options

This is for Firefox 57.0.3 (64-bit). The list of applications does not include one for mailto. I tried the suggestion for a similar problem with an older version of Firefox (posted 2010). I renamed mimeTypes.rdf to mimeTypes.rdf.old and restarted Firefox. A new rdf file was not created, although the application list was still there, albeit without one for mailto. How do I change the mailto client to Thunderbird?

This is for Firefox 57.0.3 (64-bit). The list of applications does not include one for mailto. I tried the suggestion for a similar problem with an older version of Firefox (posted 2010). I renamed mimeTypes.rdf to mimeTypes.rdf.old and restarted Firefox. A new rdf file was not created, although the application list was still there, albeit without one for mailto. How do I change the mailto client to Thunderbird?

Alle antwurden (1)

jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
  • Top 10 Contributor
more options

Hi kenkahn, a little while back, Firefox started using a file named handlers.json to store customized application handler settings. There also was a change in what is stored in the file; based on what I see, it does not record your system's default email program.

Screenshot #1 shows the two built-in handlers (Gmail and Yahoo Mail) along with MS Outlook, my default application, on the Options page. If you do not have the default handlers, your handlers.json file may have become damaged.

Screenshot #2 shows the data from handlers.json (in a Firefox tab). Whether I set Outlook as default or not, Firefox doesn't add Outlook to the file, it just changes one or two parameters.

It's all a bit mysterious...