List all Firefox tabs with title and URL

list-fftabs.py

#! /usr/bin/env python3

"""
List all Firefox tabs with title and URL

Supported input: json or jsonlz4 recovery files
Default output: title (URL)
Output format can be specified as argument
"""

import sys
import pathlib
import lz4.block
import json

path = pathlib.Path.home().joinpath('.mozilla/firefox')
files = path.glob('*default*/sessionstore-backups/recovery.js*')

try:
    template = sys.argv[1]
except IndexError:
    template = '%s (%s)'

for f in files:                                                                                                                    
    b = f.read_bytes()                                                                                                             
    if b[:8] == b'mozLz40\0':                                                                                                      
        b = lz4.block.decompress(b[8:])                                                                                            
    j = json.loads(b)                                                                                                              
    pages = {}                                                                                                                     
    for w in j['windows']:                                                                                                         
        for t in w['tabs']:                                                                                                        
            i = t['index'] - 1                                                                                                     
            tg_id = f"{t['userContextId']}"                                                                                        
            if tg_id in pages:                                                                                                     
                if 'title' in t['entries'][i] and 'url' in t['entries'][i]:                                                        
                    pages[tg_id].append(f"0: {t['entries'][i]['title']}, ({t['entries'][i]['url']})")                              
                elif 'docIdentifier' in t['entries'][i] and 'url' in t['entries'][i]:                                              
                    pages[tg_id].append(f"{t['entries'][i]['ID']}: {t['entries'][i]['docIdentifier']}, ({t['entries'][i]['url']})")
            else:                                                                                                                  
                if 'title' in t['entries'][i] and 'url' in t['entries'][i]:                                                        
                    pages[tg_id] = [f"{t['entries'][i]['ID']}: {t['entries'][i]['title']}, ({t['entries'][i]['url']})"]            
                elif 'docIdentifier' in t['entries'][i] and 'url' in t['entries'][i]:                                              
                    pages[tg_id] = [f"0: {t['entries'][i]['docIdentifier']}, ({t['entries'][i]['url']})"]                          
    for tg in pages:
        print(f"###################\n"
              f"### Tab group {tg} ###\n"
              f"###################"
              )
        for p in pages[tg]:
            print(f"{p}")