"The track is not recognized" notification very trigger-happy

[Mojken]

Describe the bug
The notification for unknown tracks appears for every single song, even though the track gets recognized a second or two afterwards. Only tested on Youtube Music.

How to reproduce
Steps to reproduce the behavior:

1. Play any song
2. See notification
3. Notice how the song actually is recognized, at least now

Expected behavior
The notification should only appear after the plugin has had the chance to detect a song, maybe just put it on a 10-ish second timer?

Debug logs
All three omitted sections are responses from last.fm for the correct song

changed mode to Loading in tab 2 2 main.js:7:18686  
Web Scrobbler: Send "get info" request: 1 main.js:1:12534  
Web Scrobbler: Send "get info" request: 1 main.js:1:12534  
Last.fm: track.getinfo response:  
{  
[OMITTED]  
} main.js:1:10236  
changed mode to Unknown in tab 2 main.js:7:18686  
song changed in tab 2 main.js:7:18837  
Object { parsed: {…}, noRegex: {…}, processed: {…}, metadata: {…}, flags: {…}, connector: {…} }  
main.js:7:18903  
Last.fm: track.getinfo response:  
{  
[OMITTED]  
} main.js:1:10236  
song changed in tab 2 main.js:7:18837  
Object { parsed: {…}, noRegex: {…}, processed: {…}, metadata: {…}, flags: {…}, connector: {…} }  
main.js:7:18903  
Web Scrobbler: Send "now playing" request: 1 main.js:1:12534  
Last.fm: track.updatenowplaying response:  
{  
[OMITTED]  
} main.js:1:10236  
changed mode to Playing in tab 2 main.js:7:18686

Environment (please complete the following information)

• OS: Linux
• Browser: Firefox
• Extension version: v3.7.0