Privacy Browser">
SorenStoutner">
soren@stoutner.com">
Translatable Entity">
]>
The &privacybrowser; Handbook
&Soren.Stoutner; &Soren.Stoutner.mail;
2016-2017, 2021-2023
&Soren.Stoutner;
&FDLNotice;
2023-02-22
&privacybrowser; version 0.1
&privacybrowser; is a web browser that respects your privacy.
The only way to prevent data from being abused is to prevent it from being collected in the first place.
KDE
privacy
browser
Introduction
&privacybrowser; is currently in an early alpha state.
Most of the features are not yet implemented, but I thought it would be useful to publish it so that users can track the progress and submit feedback.
To distinguish between the Android and the PC version, the website, issue tracker,
and code base refer to this version as Privacy Browser PC.
The best place to discuss the development of Privacy Browser is on the forum.
I also frequently post on my Mastodon account regarding the development status.
Qt WebEngine
Privacy Browser uses Qt WebEngine to render websites.
Qt WebEngine is based on the Chromium Blink source code.
Because Privacy Browser is built on the KDE Framework,
it currently uses the Qt 5 packages.
The current Qt 5 packages are in long-term support mode.
From a feature perspective, Qt WebEngine 5.15.x is based on Chromium 87.0.4280.144.
Security fixes are backported every few months with each release.
Bugs and Missing Features
There is a list of feature requests and known bugs at redmine.stoutner.com.
Users should anticipate that all the current features of Privacy Browser Android
will also be implemented in Privacy Browser PC.
There is no need at this point to create features requests for these as they will be added as I start working on each feature and have a better idea of how they will be implemented.
However, each feature that has already been implemented should be bug free.
If you discover a bug that is not already documented at redmine.stoutner.com please add it.
Below is a list of known prominent bugs or missing features in this alpha release.
The page zoom is momentarily reset every time a new URL is loaded.
If domain settings change the user agent, loading of the new URL is interrupted and the
previous site is reloaded.
Browser error messages are not displayed unless JavaScript is enabled.
Bookmarks are not yet implemented.
Blocklists are not yet implemented.
Using &privacybrowser;
Screenshot
JavaScript
JavaScript allows web pages to run scripts (programs) on your device. It allows web pages to function more like apps, but it also allows web pages to spy on you.
Most of the tracking on the internet does not work when JavaScript is disabled.
JavaScript can be toggled by clicking on the privacy shield, which is blue if JavaScript is disabled and red when it is enabled.
JavaScript
Local Storage
Local storage
in Privacy Browser encompasses cookies, DOM storage, IndexedDB, service workers, and the filesystem API.
Local storage can be toggled through an action on the toolbar.
Cookies
Cookies
allow websites to store small pieces of information for a specific host that are sent in the HTTP header every time the browser connects to that host.
Privacy Browser allows a maximum of 180 cookies with a maximum size of 4096 bytes per cookie to be set per domain.
Cookies are often used to track users across the web, particularly third-party cookies (which are completely blocked in Privacy Browser).
They are also used as a security mechanism on websites where you log in to identify it is you as you browse from page to page on a site.
Cookies
The cookies dialog is opened from .
Durable cookies are shared with all tabs that are opened after they are made durable and are preserved even when Privacy Browser is restarted.
This allows users to stay logged in to sites of their choosing. No cookies are durable by default. Making a cookie durable requires specific user interaction.
All other cookies are specific to the tab where they are created and are destroyed when the tab is closed.
DOM storage
DOM (Document Object Model) storage, also knows as web storage, allows web pages to store information on a client device.
The storage capacity is larger than for cookies and the data is not automatically sent in the headers with every HTTP request.
In Privacy Browser, each website is allowed to store a 5 MB of data in DOM storage.
DOM storage requires JavaScript to function, and, in addition, requires an extra toggle to be enabled.
In Privacy Browser, DOM storage is limited to the tab where it is created and is destroyed when the tab is closed.
IndexedDB
IndexedDB
provides web pages with a local database where they can store “significant amounts of structured data”.
There is disagreement on the internet about the maximum size of an IndexedDB database, probably because the various rendering engines keep changing their mind.
But it is usually listed at somewhere between 20% and 80% of your entire hard drive with each individual domain limited to some segment of that.
IndexedDB requires JavaScript to function.
In Privacy Browser, this database is limited to the tab where it is created and is destroyed when the tab is closed.
Service Workers
Service workers are offline JavaScript proxies of a website. They have their own cache that is usually hidden and hard to clear.
They were designed by people who want the web browser to become the operating system and run full “apps”.
In Privacy Browser, service workers are limited to the tab where they are created and are destroyed when the tab is closed.
Filesystem API
The filesystem API grants the browser direct access to the files on your system.
Like service workers, the filesystem API is a summarily bad idea thought up by those who want the browser to become an operating system.
Even when JavaScript and local storage are enabled, the filesystem API does not work in Privacy Browser.
User Agent
The user agent is a text string that is sent as part of every HTTP header that identifies the browser to the web server.
Privacy Browser's default user agent is PrivacyBrowser/1.0
.
Qt WebEngine 5.15.12’s default user agent is Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) QtWebEngine/5.15.12 Chrome/87.0.4280.144 Safari/537.36
.
Over the years user agents have become quite lengthy,
partially because they tend to include a brief history of the internet.
In the modern world they serve almost no good purpose, but some web developers still think they need them so they can send different version of their website to different browsers.
Some servers refuse to function correctly if they don't like the user agent that is sent.
At some point in the future Privacy Browser will send no user agent by default.
Not only is that currently impossible because the Qt WebEngine doesn't allow you to not send a user agent (I will probably have to fork it to enable that functionality),
but even web servers that don't care what the user agent is often refuse to send an answer if there is no user agent at all.
Getting rid of this relic of the internet is going to take some time and a retraining of common expectations.
Domain Settings
Domain setting make it easy to automatically change JavaScript, local storage, user agent, and other settings when the domain changes.
Domain settings for the current domain can be accessed through the domain settings button at the far right of the URL line edit.
Domain settings for all domains can be accessed through . When domain settings are active, the URL line edit will have a green background.
Spell Checking
Privacy Browser uses the binary .bdic Hunspell dictionary format utilized by Qt WebEngine
which was created by Google for Chromium.
Debian’s Hunspell dictionary language packages are slowly adding support for the .bdic format. Those which have are listed by Privacy Browser as suggested packages.
Once a .bdic dictionary is installed, it can be enabled in Privacy Browser’s settings.
Command Reference
Main Window
File
&Ctrl;T
File
New Tab
Create a new tab.
&Ctrl;N
File
New Window
Create a new window.
&Ctrl;P
File
Print
Print the document.
&Ctrl;&Shift;P
File
Print Preview
Display the print preview dialog.
&Ctrl;Q
File
Quit
Quit &privacybrowser;.
Edit
&Ctrl;F
Edit
Find
Display the find toolbar and focus the find text line edit. If the toolbar is already displayed, the find text line edit is refocused and the text it contains is selected.
F3
Edit
Find Next
Find the next entry on the page that matches the specified text. This action is only displayed if the find toolbar is visible.
&Shift;F3
Edit
Find Previous
Find the previous entry on the page that matches the specified text. This action is only displayed if the find toolbar is visible.
View
F5
View
Refresh
Reload the website in the current tab.
&Ctrl;&Shift;F
View
Full Screen Mode
Toggle full screen mode. This performs the same action as .
Go
&Alt;Left
Go
Back
Navigate back one step in the current tab’s history. The action is disabled if it is not possible to go back.
&Alt;Right
Go
Forward
Navigate forward one step in the current tab’s history. The action is disabled if it is not possible to go forward.
&Alt;Home
Go
Home
Load the home page in the current tab.
On-The-Fly Settings
User Agent
&Ctrl;&Alt;P
On-The-Fly Settings
User Agent
Privacy Browser
Use the Privacy Browser user agent for the current tab.
&Ctrl;&Alt;W
On-The-Fly Settings
User Agent
WebEngine Default
Use the WebEngine Default user agent for the current tab.
&Ctrl;&Alt;F
On-The-Fly Settings
User Agent
Firefox on Linux
Use the Firefox on Linux user agent for the current tab.
&Ctrl;&Alt;C
On-The-Fly Settings
User Agent
Chromium on Linux
Use the Chromium on Linux user agent for the current tab.
&Ctrl;&Alt;&Shift;F
On-The-Fly Settings
User Agent
Firefox on Windows
Use the Firefox on Windows user agent for the current tab.
&Ctrl;&Alt;&Shift;C
On-The-Fly Settings
User Agent
Chrome on Windows
Use the Chrome on Windows user agent for the current tab.
&Ctrl;&Alt;E
On-The-Fly Settings
User Agent
Edge on Windows
Use the Edge on Windows user agent for the current tab.
&Ctrl;&Alt;S
On-The-Fly Settings
User Agent
Safari on macOS
Use the Safari on macOS user agent for the current tab.
&Alt;&Shift;C
On-The-Fly Settings
User Agent
Custom
Use the custom user agent for the current tab. This action is only active if a custom user agent is set in the settings.
Zoom
&Ctrl;&Alt;Z
On-The-Fly Settings
Zoom Factor
Display the zoom factor dialog.
Search Engine
&Ctrl;&Shift;M
On-The-Fly Settings
Search Engine
Mojeek
Use Mojeek as the search engine.
&Ctrl;&Shift;O
On-The-Fly Settings
Search Engine
Monocles
Use Mojeek as the search engine.
&Ctrl;&Shift;E
On-The-Fly Settings
Search Engine
MetaGer
Use MetaGer as the search engine.
&Ctrl;&Shift;G
On-The-Fly Settings
Search Engine
Google
Use Google as the search engine.
&Ctrl;&Shift;B
On-The-Fly Settings
Search Engine
Bing
Use Bing as the search engine.
&Ctrl;&Shift;Y
On-The-Fly Settings
Search Engine
Yahoo
Use Yahoo as the search engine.
&Ctrl;&Shift;C
On-The-Fly Settings
Search Engine
Custom
Use the custom search engine. This action is only active if a custom search engine is set in the settings.
Settings
&Ctrl;D
Settings
Domain Settings
Display the domain settings dialog.
&Ctrl;;
Settings
Cookies
Display the cookies dialog.
Other Commands
F11
Toggle full screen mode. This performs the same action as .
&Esc;
Escape runs the first command that applies from the following list.
Exit full screen browsing.
Clear the find text line edit and the find text highlights.
Hide the find text toolbar.
Cookies Dialog
The cookies dialog is accessed through (see ).
Commands
A
Open the add cookie dialog.
E
Open the edit cookie dialog. This command is only valid if a cookie is currently selected.
D or ∇
Delete the currently selected cookies. A dialog will confirm the deletion before it is processed.
L
Delete all the cookies. A dialog will confirm the deletion before it is processed.
C or &Ctrl;Q
Close the cookies dialog.
Save Dialog
The save dialog pops up when a download is initiated.
Commands
S
Save the file.
C or &Ctrl;Q
Close the save dialog without saving the file.
Questions and Answers
Why are there no questions?
Because Privacy Browser is so perfectly designed that none have ever been asked. Also, because this is the first release and nobody has had a chance to ask them yet. ;)
Credits and License
Program copyright 2016-2017,2021-2023 Soren Stoutner soren@stoutner.com.
Translators:
Translations will be added in a future release.
&underGPL;
Documentation copyright 2023 Soren Stoutner soren@stoutner.com.
&underFDL;