Today, almost all new web browsers like Chrome, Firefox, Opera etc. support various types of client-side storage. In fact, any website, extension, or web application has the ability to store megabytes of data onto your computer's hard disk. In other words, any website, extension, or web application can use your copmuter's hard drive as a client-side storage to store any data, for example, extension preferences, your shopping cart data, session information such as login IDs, exact time when you visited a particular site, what site referred you to the web page, or anything else.
| Type | Quota | Chrome Profile A Chrome profile, which is basically a data directory with different files and subdirectories, contains all browser related information. | Click&Clean Options |
Cookies A cookie is a small amount of data created in the course of browsing the Web that are stored on your computer's hard drive to help facilitate certain web site functions. It contains information about how many times you have visited the site, how long you have been on the site, your login information, etc. Despite cookies are useful, they also pose a potential security and privacy risk. | The limit is 4K per cookie (no limit on the number of cookies per domain) Wiki | ||
|---|---|---|---|
Local Storage Local Storage, similar to cookies, lets a website, an extension or app to store data on your computer's hard disk. | By default, the limit is 5MB per domain * W3C, Wiki | ||
Web Databases (SQL) Web SQL Databases allows websites, extensions or apps to store data in a structured manner on the your computer. It useful for offline browsing. | By default, the limit is 5MB per domain * W3C, Wiki | ||
IndexedDB Some websites, extensions or apps can store data in a Indexed Database. Data in a Indexed Database is organized as a set of records. The database maintains indexes over records it stores. Each record consists of a key-value pair. A website can store any data in the client-side indexed database (names, credit card numbers, addresses) obtained by the site | By default, the limit is 5MB per domain * W3C, Wiki | ||
File System A website (extension, app) may use sandboxed sections of a user's local filesystem. A sanboxed section is just a subdirectory named File System in your Chrome profile directory, where data is stored in files. Websites can manage (create, delete, read, write) files and folders in this sandboxed subdirectory. There are a number of security and privacy issues | By default, the limit is 5MB per domain * W3C | ||
Application Cache Enables a website to work without the user being connected to the internet. A web page can provide a manifest which lists the files that are needed for the web page to work offline. All cached files located in a subdirectory named Application Cache in your Chrome profile directory. Application caches and cookies have similar implications with respect to privacy and security |
By default, the limit is 5MB per domain * W3C | ||
Flash Cookies (LSO) Flash Cookies, also called "Local Shared Objects" or "LSOs" stored as a data file on your PC. These can be used to track your browsing (for saves/ high scores / timings... whatever). | By default, the limit is 100K per domain (but can be 0, 10KB, 100KB, 1MB, 10MB or even unlimited) Wiki | ||
Silverlight Cookies Microsoft Silverlight is a technology similar to Flash. Like Flash, Silverlight maintains hidden cookies on your PC that are outside the reach of your browser's controls. |
By default, the limit is 1MB per domain (an application that is taken out of the browser has its quota set to 25Mb) Microsoft | ||
* An extension or App can use "unlimitedStorage" option to provide an unlimited quota for storing client-side data.
For any feedback, questions, or suggestions for improvement, please feel free to contact us via our Feedback Form on the Feedback page.
Magic Actions for YouTube™Extension for Google Chrome History EraserApp for Google Chrome FacePadExtension for Google Chrome CookiesApp for Google Chrome Satellite FinderApp for Google Chrome FastsatfinderSatellite Finder Software LocalizerLocalizer (i18n) for Chrome Extensions New MoonTheme for Google Chrome Calendar 2012Theme for Google Chrome
