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updated Chrome and Firefox installation instructions to give more options for a userscript manager
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###Method 1 (preferred, easiest, quickest)

Method 1 (preferred, easiest, quickest)

  1. Install the Tampermonkeya userscript manager extension from the Chrome Web Store (free and quick). Choose one of:
  2. Visiting any page with a .user.js extension will now make Tampermonkeythe userscript manager prompt you to install the userscript:

enter image description hereTampermonkey userscript installation dialog

Note: You may see certain posts linking to userscripts in 2 ways: 'view source' (or similar) or 'install'. Clicking 'view source' will let you do just that, and clicking 'install' will cause Tampermonkeythe userscript manager to detect it and let you install it from a simple, user-friendly screen (shown in the above screenshot).

###Method 2 (unusable in Chrome versions > 35)

Method 2 (unusable in Chrome versions > 35)

  1. Install the Greasemonkeya userscript manager add-on for Firefox if you haven't done so already. Choose one of:

  2. Click on the link to the .user.js file found in the post.

  3. A Greasemonkey InstallationAn installation dialog from the userscript manager will appear. Review the sites on which this script will work on, view the source of the script if so desired and confirm that you wish to install the script

    Greasemonkey Installation dialogGreasemonkey Installation dialog

  4. The script should now be installed. Refresh all tabs affected by the script to start using it.

###Method 1 (preferred, easiest, quickest)

  1. Install the Tampermonkey extension from the Chrome Web Store (free and quick)
  2. Visiting any page with a .user.js extension will now make Tampermonkey prompt you to install the userscript:

enter image description here

Note: You may see certain posts linking to userscripts in 2 ways: 'view source' (or similar) or 'install'. Clicking 'view source' will let you do just that, and clicking 'install' will cause Tampermonkey to detect it and let you install it from a simple, user-friendly screen (shown in the above screenshot).

###Method 2 (unusable in Chrome versions > 35)

  1. Install the Greasemonkey add-on for Firefox if you haven't done so already

  2. Click on the link to the .user.js file found in the post.

  3. A Greasemonkey Installation dialog will appear. Review the sites on which this script will work on, view the source of the script if so desired and confirm that you wish to install the script

    Greasemonkey Installation dialog

  4. The script should now be installed. Refresh all tabs affected by the script to start using it.

Method 1 (preferred, easiest, quickest)

  1. Install a userscript manager extension from the Chrome Web Store (free and quick). Choose one of:
  2. Visiting any page with a .user.js extension will now make the userscript manager prompt you to install the userscript:

Tampermonkey userscript installation dialog

Note: You may see certain posts linking to userscripts in 2 ways: 'view source' (or similar) or 'install'. Clicking 'view source' will let you do just that, and clicking 'install' will cause the userscript manager to detect it and let you install it from a simple, user-friendly screen (shown in the above screenshot).

Method 2 (unusable in Chrome versions > 35)

  1. Install a userscript manager add-on for Firefox if you haven't done so already. Choose one of:

  2. Click on the link to the .user.js file found in the post.

  3. An installation dialog from the userscript manager will appear. Review the sites on which this script will work on, view the source of the script if so desired and confirm that you wish to install the script

    Greasemonkey Installation dialog

  4. The script should now be installed. Refresh all tabs affected by the script to start using it.

excerpt: use `[` and `]` for tags. wiki: separate old chrome info and new chrome info clearly -- I think it confused some users before!
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How to install user scripts in Google Chrome

There are two methods for installing UserScriptsuserscripts in Chrome:

###Method 1 (preferred, easiest, quickest)

  1. Install the Tampermonkey extension from the Chrome Web Store (free and quick)
  2. Visiting any page with a .user.js extension will now make Tampermonkey prompt you to install the userscript:

enter image description here

Note: You may see certain posts linking to userscripts in 2 ways: 'view source' (or similar) or 'install'. The first isClicking 'view source' will let you do just that, and clicking 'install' will cause Tampermonkey to detect it and let you install the TamperMonkey extension, which makes installationit from a simple and easy, user-friendly screen (shown in the above screenshot). The second is to follow these instructions below:

Note: As of Chrome 35 (late May 2014), downloaded user scripts cannot be installed using the second method. Please use the TamperMonkey extension.

###Method 2 (unusable in Chrome versions > 35)

How to install user scripts in Chrome

There are two methods for installing UserScripts in Chrome. The first is to install the TamperMonkey extension, which makes installation simple and easy. The second is to follow these instructions below:

Note: As of Chrome 35 (late May 2014), downloaded user scripts cannot be installed using the second method. Please use the TamperMonkey extension.

How to install user scripts in Google Chrome

There are two methods for installing userscripts in Chrome:

###Method 1 (preferred, easiest, quickest)

  1. Install the Tampermonkey extension from the Chrome Web Store (free and quick)
  2. Visiting any page with a .user.js extension will now make Tampermonkey prompt you to install the userscript:

enter image description here

Note: You may see certain posts linking to userscripts in 2 ways: 'view source' (or similar) or 'install'. Clicking 'view source' will let you do just that, and clicking 'install' will cause Tampermonkey to detect it and let you install it from a simple, user-friendly screen (shown in the above screenshot).

###Method 2 (unusable in Chrome versions > 35)

added note about Chrome 35, improved images, minor formatting changes
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remove outdated Internet Explorer instructions; the link is dead, and apparently so is the extension too
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Updating description to align with new script/scripts refinement. See post 4169.
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Added plug for TamperMonkey - which is much easier than manual installation.
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Nathan Osman
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User script install process has changed in Chrome dev & soon will be brought into stable
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Jeff Atwood
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Jeff Atwood
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Added how-to for NinjaKit (Safari extension)
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added 10 characters in body
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deleted 56 characters in body
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Jeff Atwood
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add Internet Explorer instructions
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Rebecca Chernoff
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adding Opera instructions
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Rebecca Chernoff
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Added in a Installation instructions section for Chrome, Firefox and Safari
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