Un petit outils en ligne sympa pour générer une configuration Firefox aux petits oignons (désactiver Pocket, lien sponsorisés, avertissement sur about:config, rapports de plantage, link prefetching...)

This extension prevents sites you specify from appearing in Google search results.

Profile-sync-daemon (psd) is a tiny pseudo-daemon designed to manage your browser's profile in tmpfs and to periodically sync it back to your physical disc (HDD/SSD). This is accomplished via a symlinking step and an innovative use of rsync to maintain back-up and synchronization between the two. One of the major design goals of psd is a completely transparent user experience.

Pour trouver le dossier du profile, copiez ceci dans la barre d’adresse et ça vous donnera le chemin vers le dossier du profile : about:profiles. Allez dans ce dossier, puis allez dans le sous-dossier chrome (s’il ne s’y trouve pas, créez-le).

Créez ensuite un fichier userChrome.css (attention : c’est un fichier .css, il ne faut pas qu’il y ait le .txt à la fin).

Et copiez-y le code suivant :

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";);

/* ne garde plus que les icône, pas les étiquettes */
#personal-bookmarks .toolbarbutton-text {display:none!important}

#PersonalToolbar {
position: fixed!important;
/* own width of bookmark-bars */
right: 35px!important;
/* hight of url-bar + menu bar (top:0 corresponds of very top of firefox's interface) */
top: 100px!important;
height: 35px!important;
/* turns the personnalToolbar on its side (from top-right, 90° CCW */
transform-origin: top right!important;
transform: rotate(-90deg)!important;
padding: 0!important;
margin: 0!important;
}

#personal-bookmarks {
height: 100%!important;
width: 100%!important;
padding: 0!important;
margin: 0!important;
/* to have the icons in the previous listing order, rotate the list-of bookmarks 180° CW */
transform: rotate(180deg)!important;
transform-origin: 50% 50%!important;
}
#personal-bookmarks .bookmark-item {
/* Icons are on theire side due to the 90° + 180° rotation. Put them back with a rotation, 90° CCW */
transform: rotate(-90deg)!important;
height: 100%!important;
width: 25px!important;
}

/* this is to make room for the toolbar besides the browsing area of Firefox */
#browser,
#browser-bottombox {
   margin-right: 35px!important;
}

Un tas de params avec explications dans about:config

Combo du patron: 🇨🇹🇷🇱+🇸🇭🇮🇫🇹+🇹

Puisque Mozilla semble insister sur le fait qu’elle va continuer à utiliser Google Analytics, les utilisateurs de Firefox peuvent pour le moment désactiver la page d’ajout de modules et chargeant
about:config?filter=extensions.webservice.discoverURL
Ensuite il faudra double-cliquer sur la préférence et effacer tous les caractères pour que la valeur soit vide. Enfin, redémarrez Firefox.

Highlight the text that you want to be spoken and click play button at the top right corner of your window. Sit back and listen. It's that easy. :-)

*French Female
*UK English Female
*UK English Male
*US English Female
*US English Male

vérifiez, les paramètres de security.tls.version afin que les valeurs soient celles-ci (min à 1 et max à 3):
security tls version firefox


Ensuite, modifiez :

   geo.enabled à False afin de supprimer la géolocalisation
   network.http.sendRefererHeader à 0 afin de ne plus communiquer la dernière page visitée
   browser.safebrowsing.malware.enabled à False et supprimez les données de browser.safebrowsing.provider.google.lists afin d’éviter que Google vous profile
   offline-apps.allow_by_default à False et offline-apps.quota.warn à 0 afin que les données offline ne soient utilisées à votre insu

N’oubliez pas de modifier les préférences par défaut afin d’éviter d’être pisté et d’accepter les cookies tiers inutiles.

browser.privatebrowsing.autostart

The Private Browsing mode was introduced to stop you leaving any embarrassing trails of what you have been up to for other users of your browser to find. Most importantly it stops (most) cookies and does not record any History of websites you have visited or forms you have filled in. The important thing to remember is that Private Browsing is great for protecting your privacy from others using the same computer, but does little to protect someone from the outside seeing what you get up to (e.g. your ISP).

Even if you are the sole user of a computer, it is still a good idea to always surf the internet in Private Browsing mode, thanks to its cookie blocking features in particular. By setting this Preference to true you will automatically start Firefox in Private Browsing mode, so you will never forget to turn it on. Click here for the Mozilla help entry.
browser.safebrowsing.enabled*

Firefox ships with the Google Safe Browsing extension built-in and enabled by default. Designed to prevent phishing, it compares the websites you visit to a Google-run blacklist. This means that Google is constantly able to track you. If you have installed our recommended Firefox extensions then you will gain no additional protection from Google Safe Browsing, while telling Google a great deal about your browsing history. We therefore strongly recommend that you turn it off by setting the value to false. Click here for the Mozilla help entry.
browser.safebrowsing.malware.enabled*

Safe Browsing (now renamed Phishing Protection) is basically a version of Google Safe Browsing licenced to Mozilla (but which still reports to Google). We therefore recommend that you set it to false, for the same reasons as above. Click here for the Mozilla help entry.
browser.startup.homepage

By default, Firefox will start on the Mozilla Firefox Start Page, displaying a Google search box. Google (along with most major commercial search engines such as Bing! and Yahoo!) stores a great deal of information about you, including a record of the searches you make. To start on a different page, simply enter the website address of your preferred choice. We use the anonymous no logs search engine DuckDuckGo (https://duckduckgo.com/), but Start Page may be an even better choice (https://startpage.com/). Click here for the Mozilla help entry.
browser.startup.page

If you prefer to start Firefox on a blank page, change this setting to ‘0’. Click here for the Mozilla help entry.
datareporting.healthreport.uploadEnabled

You can see details about your Firefox browser’s performance and stability any time by reviewing the Firefox Health Report (Firefox tab -> Help -> Firefox Health Report). By default this report is periodically send to Mozilla (in anonymous aggregate form) to help it understand problems and plan future developments. For maximum security you should prevent this by setting this entry to false (you will still be able to see your report, it just won’t be sent to Mozilla). Click here for the Mozilla help entry.
dom.event.clipboardevents.enabled*

If you cut, copy or paste something from a website, then the website owners can get notified of exactly which part of a webpage you have cut, copied or pasted. If they wish, they can then record or modify the text, or prevent you from copying (etc.). They can also prevent you from pasting text into online forms. By setting this entry to false you prevent websites knowing where you pasted their text, and as a side-benefit will be able to bypass restrictions on cutting and pasting). Click here for the Mozilla help entry.
dom.storage.enabled*

We discuss the dangers of DOM storage (also known as web storage) in our article ‘More things that go bump in the night: HTTP ETags, Web Storage, and ‘history stealing’. Basically, this way of storing information within web browsers is one of the most pernicious methods used by commercial internet companies to track you across the web, and is growing in popularity as netizens become more aware of the danger of ‘regular’ cookies. Fortunately DOM storage is easy to turn off by setting this entry to false. Click here for the Mozilla help entry. Update: Thanks to feedback from readers, it is clear that setting dom.storage.enabled to false can “break” some website. Changing this setting should therefore be done with caution.
geo.enabled*

When you visit a ‘location aware’ website you will be asked if you want to share your location. If you answer yes then Firefox will send information about nearby wireless access points and your computer’s IP address to Google Location Service, and then pass that information on to the website (a random client identifier is also assigned by Google, which expires every 2 weeks). Although you should be asked every time this happens, and need to give your explicit consent, you can prevent giving consent accidentally or through carelessness by turning this feature off (set the value to false). Click here for the Mozilla help entry.
geo.wifi.uri

If you set geo.enabled (above) to false, then this setting, which determines the geolocation service used (Google Location Service by default) shouldn’t matter. If it makes you feel better however, then you can change this to 127.0.0.1 (also known as localhost or the ‘loopback address’). In theory this setting could point to an alternative service, but none such really exist at the moment. Click here for the Mozilla help entry.
network.cookie.cookieBehavior

If you use a good cookie manager such as Cookie Monster (recommended), then you will not need to touch this preference. If not then it is probably a good idea to set it to ‘1’ (only cookies from the originating server are allowed). Click here for the Mozilla help entry.
network.cookie.lifetimePolicy

Again, using the Cookie Monster add-on is probably the best policy, but if you prefer not to then you can control when cookies expire by setting this setting to ‘2’ (the cookie expires at the end of the session (when the browser closes)). Click here for the Mozilla help entry.
network.dns.disablePrefetch

Firefox improves page load times by resolving domain names ‘proactively and in parallel’ (i.e. it pre-fetches the information).  In their paper ‘DNS Prefetching and Its Privacy Implications: When Good Things Go Bad’, Srinivas Krishnan and Fabian Monrose argue that this practice can lead to ‘privacy threats that are ripe for abuse. More specifically… where it is possible to infer the likely search terms issued by clients using a given DNS resolver.’ DNS prefetching can be turned off by setting this value to true. If you can’t find this setting then you will have to add it manually by right-clicking on the about:config screen, selecting ‘New’ -> ‘Boolean’ and entering ‘network.dns.disablePrefetch’ into the dialog box. Click here for the Mozilla help entry.
network.http.sendRefererHeader

When you click on a hyperlink, the page you go to can request information about the page you clicked the link from. This information is contained in the ‘referer header’, and can be used to track you across a website. Furthermore, Javacript scripts can ‘see’ and reference the refereer header if this setting is turned on. Although Mozilla cautions that disabling refereer headings may cause problems with some websites, we advise changing the setting to ‘0’ (never send the referer header or set ‘document.referrer’). Click here for the Mozilla help entry.
network.http.sendSecureXSiteReferrer*

More or less the same as the entry above, except that it allows you to be tracked across websites. You can disable this setting by changing the value to false. Click here for the Mozilla help entry.
network.prefetch-next*

Firefox speeds up the browsing process by scanning links on a webpage, and pre-downloading linked-to webpages when idle. Although disabling this preference will slow down browsing somewhat, from a privacy perspective you really should set it to false. Click here for the Mozilla help entry.
privacy.donottrackheader.enabled*

Most modern browsers now support a ‘Do not track’ feature, which asks websites not to track you, and Firefox is no exception. While this should most certainly be turned on (set to true), you should be aware that compliance from websites is entirely voluntary, so the protection it affords can be considered fairly minimal. Click here for the Mozilla help entry.
privacy.donottrackheader.value*

While the privacy.donottrackheader.enabled (above) setting determines whether a ‘Do not track’ instruction is sent to a website, this setting determines what that instruction actually says. You should therefore set it to 1 to request a websites do not track you (a header stating consent to being tracked is sent to all websites if privacy.donottrackheader.enabled is set True). Click here for the Mozilla help entry.

privacy.trackingprotection.enabled

This enables a blocklist based on Disconnect’s blocklist, to help prevent cross-site tracking. Once Tracking Protection is activated, you will see a shield in your address bar whenever Firefox is blocking either tracking domains or mixed content. As a side-benefit, this setting also causes pages to load 44 percent quicker on average, data usage drops by 29 percent when connecting to the top 200 Alexa websites, and the number of HTTP cookies stored by the browser falls by 67.5%. Click here for the Mozilla help entry.

toolkit.telemetry.enabled

Telemetry covers all sorts of statistical data related to your browser’s performance, usage and responsiveness. Firefox can send anonymous reports with this data to Mozilla, which is of great assistance to developers, and for this reason you may consider turning it on, but for maximum security you should check that it is false (it is usually false by default). Click here for the Mozilla help entry.
Conclusion

Changing these advanced settings in Firefox is a good and fairly easy way to improve your internet security and stop third parties from tracking your movements across the internet. To further improve your browser security we suggest you check out these articles:

   Recommended Firefox security extensions
   Supercookies, Flash cookies, Zombie cookies and things that go bump in the night
   More things that go bump in the night: HTTP ETags, Web Storage, and ‘history stealing’, and
    Your browser’s fingerprint and how to reduce it.

J’avais publié un article en 2012 sur la manière de désactiver le prefetching DNS dans Firefox. Le prefetching DNS consiste, au niveau de votre navigateur, à faire une requête DNS sur tous les noms de domaines présents dans la page, en anticipant sur la probabilité que vous cliquiez sur l’un des liens de la page. Ce serait sensé accélérer votre navigation.

Ça, c’est pour la version des gens heureux au pays des bisounours. La vérité est ailleurs ! Le prefetching DNS est devenu une arme utilisée par Google pour connaître à peu près tout de la navigation d’abrutis notoires qui utilisent ses DNS publics (8.8.8.8 et 8.8.4.4). Pour ceux d’entre vous qui utilisent OpenDNS racheté par Cisco, ce n’est pas beaucoup mieux ! J’ai moi-même utilisé, un temps, OpenDNS. Nul n’est parfait. ;+)
Désactiver le prefetching dans Firefox

A partir de la barre d’adresses, tapez about:config et passez les options aux valeurs suivantes par double-clic :

   network.dns.disablePrefetch -> true
   network.dns.disablePrefetchFromHTTPS -> true
   network.prefetch-next -> false (facultatif)


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