Web browsers store your personal data -- bookmarks, history, settings, extensions, and more -- in a profile. You can create separate profiles to split things up -- for example, you could have one profile for work and one for play.
Each user account normally has a single profile for each browser, but most web browsers allow you to create separate profiles. You can even use multiple profiles at the same time, being logged into different accounts in each of them.
Chrome makes using multiple browser profiles easy. We've previously covered how to use multiple browser profiles in Chrome, and the process is still fairly similar. To create additional browser profiles, open the Settings page (click the menu button and select Settings), and then click Add new user under Users.
Select a user icon and provide a name. In addition to their own bookmarks, history, and other settings, each user has their own Google Sync settings and can be logged into their own Google accounts.
The Profile Manager will open. Use the Create Profile button to create new browser profiles. If you would like to be prompted to choose a profile every time you start Firefox, uncheck the Don't ask at startup option.
Firefox only allows you to run a single browser profile at a time by default. To have multiple Firefox profiles running at the same time, you'll need to launch Firefox with the -no-remote switch. For example, to launch Firefox's Profile Manager with the -no-remote switch, use the following command:
You'll need to use the -no-remote option to launch each Firefox instance. (If Firefox is already running, close it completely and launch it with -no-remote.) You can add the -no-remote option to your Firefox shortcuts to make this easier.
The new browser window will share your favorites, history, and other settings, but it will have its own separate cookies. This means you can use this feature to log into multiple accounts on the same website, just as the profile features allow you to in Chrome and Firefox.
Internet Explorer doesn't appear to like the "Runas" tool built into Windows, which allows you to run a program as another Windows user account and see it on your desktop. If completely separate IE profiles are important to you, you could create a new Windows user account and switch between them.
Opera has support for multiple profiles. You can have multiple Opera instances running at the same time, each with their own profile. Unfortunately, this must be achieved by editing Opera's .ini files by hand and launching opera with a /settings command-line switch. (If you're interested in doing this manually, see the Opera Browser Wiki for instructions.)
Instead of doing all the work by hand, you can download the user-created Opera Profile Creator. It will do the tedious work for you, creating new shortcuts that will open Opera with separate profiles.
Safari doesn't appear to support multiple profiles. The closest you can get is having several user accounts and using fast user switching to switch between them, as each user has their own Safari profile.
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Chris was a PCWorld columnist for two years. He founded PCWorld's "World Beyond Windows" column, which covered the latest developments in open-source operating systems like Linux and Chrome OS. Beyond the column, he wrote about everything from Windows to tech travel tips.
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Each user profile has its own settings that are completely independent of other user profiles. A classic example is a family computer that is shared by all family members. Each member could use an individual user profile with a custom homepage, themes, customizations, restrictions and plugins that are enabled.
Update: Opera switched to a different browsing engine in recent time. The instructions below are only valid for the old version of Opera. Opera Profile Creator is not available anymore on the Internet.
Opera uses one of the most complicated processes to create a new user profile. The manual process involves creating new folders, copying Opera profile folder information and editing configuration files.
The profile generator is compatible with most Opera editions up to the latest Opera 12.x releases. The software detects the Opera path automatically, and will create a shortcut to that profile on the desktop. All the user has to do is to select a new profile directory for the newly created Opera profile.
Internet Explorer does not support multiple user profiles running under the same user account. The only valid option, as far as we know, is to create new Windows accounts for each user, which are then automatically rewarded with a new Internet Explorer user profile.
Locate the firefox executable. Windows users usually find it in C:\Program Files\Mozilla Firefox\. Right click firefox.exe and select create shortcut from the context menu. Right-click the new shortcut and select Properties. Locate the target parameter and append
Update: The most recent versions of Google Chrome ship with built-in user profiles. Just open the settings of the browser chrome://settings/ and locate the people section on the page. There you find options to add, edit or remove a person from the browser.
An elevated command prompt may be needed on some operating systems. Google Chrome will automatically create a new user profile if the selected directory does not exist or contain profile information, otherwise it will load the existing profile and start the browser with it. It is recommended to create a desktop shortcut to start the newly created profiles without the command line.
Really Simple Syndication (RSS) is an XML-based document format for the syndication of web content so that it can be republished on other sites or downloaded periodically and presented to users. The RSS 2.0 specification describes how to create RSS documents.
This profile is a set of recommendations for how to create RSS documents that work best in the wide and diverse audience of client software that supports the format. The definitions of the RSS elements in this profile are provided for convenience and must not be treated as definitive. Refer to the specification for authorititive guidance on the format.
An RSS document, also called a feed, must conform to the XML 1.0 specification and may contain elements and attributes defined in a namespace according to the Namespaces in XML specification. RSS elements do not belong to a namespace. All elements in an RSS feed that are not defined in a namespace must be described in the specification. None of the restrictions described in the specification apply to elements or attributes defined in a namespace.
The test of date-time values was conducted on the aggregators Blogbridge, Bloglines, BottomFeeder, FeedDemon, FeedReader, FeederReader, GreatNews, Internet Explorer 7, JetBrains Omea, Mozilla Thunderbird, Newsgator Online, NewzCrawler, Pluck, RSSBandit, RSSOwl, Sharpreader and Snarfer.
For all elements defined in the RSS specification that enclose character data, the text should be interpreted as plain text with the exception of an item's description element, which must be suitable for presentation as HTML. All of these elements must not contain child elements.
The specification has lacked clarity regarding whether HTML is permitted in elements other than an item's description, leading to wide variance in how aggregators treat character data in other elements. This makes it especially difficult for a publisher to determine how to encode the characters "&" and "
This form of encoding was presented successfully for all seven of the preceding examples in Apple Safari, Bloglines, Mozilla Firefox and Internet Explorer, six-of-seven in Opera and five-of-seven in FeedDemon and Google Reader. It failed three or more tests in BottomFeeder, My Yahoo and NewsGator Online.
Although RFC 822 permits multiple spaces and comments between each component in date-time values, most aggregators fail to interpret them correctly. Publishers should not include comments or more than one space between components.
Several elements must contain an e-mail address, but there's no requirement to follow a specific format for such addresses. Publishers could format addresses according to the RFC 2822 Address Specification, the RFC 2368 guidelines for mailto links, or some other scheme.
An Internationalized Resource Identifier (IRI) provides a means to identify Internet resources using non-ASCII characters that can't be present in URLs. All link and url elements must be valid URLs, so an IRI that contains non-ASCII characters must be converted to a URL using the procedure described in RFC 3987.
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