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Firefox very slow on first launch after booting

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  • Last reply by Zio Saba

Zio Saba
Zio Saba
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Good morning everyone, sorry in advance if I made any mistakes in English.

I'm currently using Firefox 125.0.3 (64-bits) on a computer with a mostly fresh install of Windows 10 22H2. I've been using Firefox for many years and on many different computers, never facing any issue and my experience with the browser was always very fast and snappy.

Few days ago, while I was browsing normally, Firefox had a really bad crash: everything froze up, buttons and bookmarks remained pressable but became unresponsive, and I had to close the process using the task manager. From this point on, whenever I tried launching a new instance of Firefox, I was met with a blank welcome page, everything in the toolbar was replaces by what looked like a black loading bar and also all my bookmarks were not loading properly. I tried restarting the computer, but the problem remained and so I was forced to remove and reinstall Firefox again.

My current problem is that whenever I boot up the PC, the first time I launch Firefox it takes around 10 seconds before a new page shows up. After this slow startup phase, the browser opens any new windows almost instantly and works flawlessly. I also compared the startup times with my other laptops, where Firefox has been installed only once, and usually I have to wait only 1-2 seconds on the first boot before the browser opens up.

I tried to remove Firefox in many ways: using the "Restore Firefox" option, removing and reinstalling while keeping the profiles' directories, performing a clean reinstall using softwares like CCleaner and Revo to remove any directory and registry entry, and even tried using a fresh install without any of my user preferences or addons.

I also followed this guide, but to no avail: https://support.mozilla.org/it/kb/Firefox%20%C3%A8%20lento%20ad%20avviarsi#firefox:win10:fx125

Looking up on the web for this exact problem, the only result that matches this exact situation is a year-old post on this forum: https://forums.mozillazine.org/viewtopic.php?t=3105628


Thanks in advance.

Good morning everyone, sorry in advance if I made any mistakes in English. I'm currently using Firefox 125.0.3 (64-bits) on a computer with a mostly fresh install of Windows 10 22H2. I've been using Firefox for many years and on many different computers, never facing any issue and my experience with the browser was always very fast and snappy. Few days ago, while I was browsing normally, Firefox had a really bad crash: everything froze up, buttons and bookmarks remained pressable but became unresponsive, and I had to close the process using the task manager. From this point on, whenever I tried launching a new instance of Firefox, I was met with a blank welcome page, everything in the toolbar was replaces by what looked like a black loading bar and also all my bookmarks were not loading properly. I tried restarting the computer, but the problem remained and so I was forced to remove and reinstall Firefox again. My current problem is that whenever I boot up the PC, the first time I launch Firefox it takes around 10 seconds before a new page shows up. After this slow startup phase, the browser opens any new windows almost instantly and works flawlessly. I also compared the startup times with my other laptops, where Firefox has been installed only once, and usually I have to wait only 1-2 seconds on the first boot before the browser opens up. I tried to remove Firefox in many ways: using the "Restore Firefox" option, removing and reinstalling while keeping the profiles' directories, performing a clean reinstall using softwares like CCleaner and Revo to remove any directory and registry entry, and even tried using a fresh install without any of my user preferences or addons. I also followed this guide, but to no avail: https://support.mozilla.org/it/kb/Firefox%20%C3%A8%20lento%20ad%20avviarsi#firefox:win10:fx125 Looking up on the web for this exact problem, the only result that matches this exact situation is a year-old post on this forum: https://forums.mozillazine.org/viewtopic.php?t=3105628 Thanks in advance.

All Replies (4)

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Ciao, nella sezione in Italiano di https://support.mozilla.org puoi scrivere direttamente in Italiano. Quando succede un crash grave Firefox non riesce a salvare tutta una serie di informazioni necessarie al suo pieno funzionamento. Nei successivi avvivi deve quindi procedere a ricostruire file importanti del profilo e puù quindi rallentare. In genere si risolve nel giro di poco tempo.

In alternativa, crea un nuovo profilo da affiancare a quello attuale -> https://support.mozilla.org/it/kb/Gestione%20dei%20profili#w_creare-un-profilo Con questo profilo è come se ripartissi da una installazione pulita e non dovresti riscontare rallentamenti. Se tutto funziona, puoi trasferire dal vecchio al nuovo profilo le informazioni utili (segnalibri, password etc.) e poi eventualmente eliminare il vecchio profilo.

Zio Saba
Zio Saba Question owner
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Buongiorno, la ringrazio della risposta.

Purtroppo, dopo aver eseguito i passaggi da lei indicati, l'esperienza è peggiorata terribilmente. Prima, durante il primo avvio, mi era sufficiente attendere una decina di secondi sul desktop prima che comparisse la finestra di Firefox e qualsiasi successiva istanza si apriva istantaneamente.

Adesso, sia durante il primo avvio che durante quelli successivi, Firefox apre quella finestra interamente grigia con barre nere di caricamento sulle schede, segnalibri, barra di ricerca e così via. Inoltre, adesso anche aprire una nuova istanza di Firefox successiva alla prima comporta un'attesa di qualche secondo con questa finestra nera di caricamento prima che il browser riprenda a funzionare normalmente.

Ho provato a ripristinare il profilo precendente (default-release) così come eliminare quello temporaneo creato prima, ma il peggioramento persiste.

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Quindi con un profilo pulito la situazione è peggiore? Allora non c'è altro che io possa suggerirti. Ma dubito che il problema sia Firefox.

Zio Saba
Zio Saba Question owner
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Adesso ho nuovamente reinstallato Firefox e sono tornato alla situazione precedente, ovvero lunga attesa durante il primo avvio ma funzionalità e responsività normali in tutti quelli successivi.

Non vorrei che il problema possa essere più legato a dei file o chiavi di registro corrotte che non riesco a pulire completamente tra le varie installazioni, e che continuano a creare questa spiacevole situazione.

Ho Firefox installato su diversi dispositivi, ed ha sempre funzionato velocemente e aprendosi in pochi istanti. Da quando invece si è presentato questo crash e sono stato costretto a reinstallare, si è presentato il problema, cosa che appunto non succede negli altri due portatili da me posseduti che sono ancora alla prima installazione di Firefox e non sono stati vittima di crash gravi.