I don't have a hardware reader, but I tried installing the software from www.id.ee, and it reports this error when loading the pkcs11 module:
> [Exception... "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIPKCS11ModuleDB.addModule]" nsresult: "0x80004005 (NS_ERROR_FAILURE)" location: "JS frame :: chrome://browser/content/parent/ext-pkcs11.js :: installModule :: line 90" data: no] ext-pkcs11.js:90:20
I'm just guessing here, but I would expect the module to still be loaded even without the hardware present.
Bug 1636100 Comment 5 Edit History
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I don't have a hardware reader, but I tried installing the software from www.id.ee, and after (successful?) installation, Firefox Beta 77 reports this error when loading the pkcs11 module:
> [Exception... "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIPKCS11ModuleDB.addModule]" nsresult: "0x80004005 (NS_ERROR_FAILURE)" location: "JS frame :: chrome://browser/content/parent/ext-pkcs11.js :: installModule :: line 90" data: no] ext-pkcs11.js:90:20
I'm just guessing here, but I would expect the module to still be loaded even without the hardware present.