Adds support for removing older versions of the eID middleware from Firefox, where relevant.

Works better on Fedora 29 in conjunction with p11-kit

Updated the messages that appear when the middleware could not be found so it becomes clearer that an update may be necessary.

This version of the add-on can be loaded into Firefox 57. Users of older versions of firefox should use version 1.0.23 of the add-on, which continues to work correctly.

Note that in Firefox 57, the add-on is not able to configure the eID middleware in your browser. If you're upgrading from Firefox 56 or below, then the middleware should continue to function, and you do not need to do anything. If you're installing Firefox 57 on a new system, however, you will need to manually configure Firefox. See the FAQ on https://eid.belgium.be/en/log#7499 (Windows), https://eid.belgium.be/en/log#7503 (Mac) and https://eid.belgium.be/en/log#7507 (Linux) for the procedure on how to do that.

This version of the add-on can be loaded into Firefox 57. Users of older versions of firefox should use version 1.0.23 of the add-on, which continues to work correctly.

Note that in Firefox 57, the add-on is not able to configure the eID middleware in your browser. If you're upgrading from Firefox 56 or below, then the middleware should continue to function, and you do not need to do anything. If you're installing Firefox 57 on a new system, however, you will need to manually configure Firefox. See the FAQ on https://eid.belgium.be/en/log#7499 (Windows), https://eid.belgium.be/en/log#7503 (Mac) and https://eid.belgium.be/en/log#7507 (Linux) for the procedure on how to do that.

This version of the add-on can be loaded into Firefox 57. Users of older versions of firefox should use version 1.0.23 of the add-on, which continues to work correctly.

Note that in Firefox 57, the add-on is not able to configure the eID middleware in your browser. If you're upgrading from Firefox 56 or below, then the middleware should continue to function, and you do not need to do anything. If you're installing Firefox 57 on a new system, however, you will need to manually configure Firefox. See the FAQ on https://eid.belgium.be/en/log#7499 (Windows), https://eid.belgium.be/en/log#7503 (Mac) and https://eid.belgium.be/en/log#7507 (Linux) for the procedure on how to do that.