Did you try to open the HTML backup created by the bookbackreader tool in a tab ? Does it show any bookmarks present in the file ? Did you try an earlier backup ?

The name of automatically created JSON bookmark backups in the bookmarkbackups folder includes a total item count (folders and separators included) and an hash value to prevent saving the same backup more than once. You also see this count in the Restore menu drop-down list.

• bookmarks-YYYY-MM-DD_<item count>_<hash>.jsonlz4.

When I open the HTML backup in a tab I don't see any bookmarks in the file. There weren't any backups of bookmarks in the "Import and Backup" because of having to reset my PC. But, I'm able to successfully create a new backup of bookmarks and restore them.

I posted code to use with the Browser Console to decompress a compressed file in another thread.

• /questions/1427321#answer-1610848

To enable the command-line in the console:

• select "Enable browser chrome and add-on debugging toolboxes" in the Web Developer Tools settings
• https://firefox-source-docs.mozilla.org/devtools-user/settings/
• https://firefox-source-docs.mozilla.org/devtools-user/browser_console/

javascript:/*(DE)COMPRESS LZ4::2023/10-14*/
(function(){
/*IOUTILS - [80]*/
async function copyFile(inpFile, outFile) {
  var data = await IOUtils.readUTF8(inpFile, /lz4$/.test(inpFile) ? {decompress:true} : {decompress:false});
  await IOUtils.writeUTF8(outFile, data, /lz4$/.test(outFile) ? {compress:true} : {compress:false});
}
var fu = Cu.import("resource://gre/modules/FileUtils.jsm").FileUtils;
var fp = Cc["@mozilla.org/filepicker;1"].createInstance(Ci.nsIFilePicker);
fp.init(window, "Open File", Ci.nsIFilePicker.modeOpen);
fp.appendFilter(".JSON Uncompressed Files","*.json");
fp.appendFilter(".*LZ4* Compressed Files","*.*lz4");
fp.displayDirectory=fu.File(PathUtils.join(PathUtils.profileDir,""));
fp.open((aResult)=>{
if (aResult==Ci.nsIFilePicker.returnOK){
if(fp.file.exists()&&fp.file.isFile()&&fp.file.isReadable()){
var inpFile=fp.file.path;
var outFile=inpFile.replace(/lz4$/i,"")+(/lz4$/.test(inpFile)?"":"lz4");
//prompt(inpFile+"\n"+outFile);
try{
copyFile(inpFile, outFile);
console.log("Saved as: \"file://" + outFile + "\"");
prompt("Saved as:\n" + outFile,"file://" + outFile);
}
catch(err){console.log(err);}
}
}else{console.log("<canceled>");}
});
})()

Thank you for your response. Unfortunately, I'm still getting the same result where the bookmarks wont load. When I attempt to restore them I see the bookmarks bar flash for a moment as though they are about to be loaded but they don't.