I have opened another profile and extracted an OPML from May 2020. But I would rather not have data thrown away. I have identified the various folders by UUID and transferred everything (inc /cache and METADATA files) over. Brief is still not just without feeds, but broken.
Hereās debugging output:
The Components object is deprecated. It will soon be removed. regex.js:12:20
Initializing the feed request monitor request-monitor.js:2:13
Brief: opening database in persistent storage database.js:138:17
The āstorageā attribute in options passed to indexedDB.open is deprecated and will soon be removed. To get persistent storage, please use navigator.storage.persist() instead. database.js:148:31
Found no database in persistent storage database.js:162:29
Brief: opening database in default storage with upgrade database.js:138:17
Error opening database: UnknownError The operation failed for reasons unrelated to the database itself and not covered by any other error code. database.js:167:25
Uncaught (in promise)TypeError: this._db is null
loadFeeds moz-extension://b787ebe5-d8b9-4406-8402-3a217e5d450d/modules/database.js:305
init moz-extension://b787ebe5-d8b9-4406-8402-3a217e5d450d/modules/database.js:90
database.js:305:18
extension is undefined 4 ExtensionParent.jsm:321
Brief: opening database in default storage database.js:138:17
Error opening database: UnknownError The operation failed for reasons unrelated to the database itself and not covered by any other error code. database.js:167:25
_open moz-extension://b787ebe5-d8b9-4406-8402-3a217e5d450d/modules/database.js:167
Uncaught (in promise)TypeError: this._db is null
loadFeeds moz-extension://b787ebe5-d8b9-4406-8402-3a217e5d450d/modules/database.js:305
init moz-extension://b787ebe5-d8b9-4406-8402-3a217e5d450d/modules/database.js:90