Caleb Foster
Firefox users have expressed frustration with the browser's generation of thumbnails for previously visited websites. This can be an issue when sharing screens for work, as it may be unprofessional to have website thumbnails showing up. While there are suggestions to disable the new tab page, this does not prevent Firefox from generating thumbnails. To truly prevent Firefox from generating thumbnails, you can create a new Boolean pref browser.pagethumbnails.capturing_disabled on the about:config page and set the value to true. You can also delete the thumbnails folder in the Firefox profile folder to remove already-stored thumbnails.
| Characteristics | Values |
|---|---|
| Location of the thumbnails folder in Windows XP | C:\Documents and Settings[Owner]\Local Settings\Application Data\Mozilla\Firefox\Profiles\z5sep971.default |
| Location of the thumbnails folder in Windows 8.1 | Not in the profile folder; check the location of the disk cache on the about:cache and go to the parent directory |
| Location of the thumbnails folder in Windows XP (alternative) | C:\Documents and Settings<Windows login/user name>\Application Data\Mozilla\Firefox\Profiles<profile folder> |
| How to disable thumbnails on the about:newtab page | Create a new Boolean pref browser.pagethumbnails.capturing_disabled on the about:config page and set the value to true |
| How to open the about:config page | Type or paste "about:config" in the address bar and press Enter |
| How to remove stored thumbnails | Delete the thumbnails folder in the Firefox profile folder |
| How to access the Firefox profile folder | Help > Troubleshooting Information > Profile Directory: Show Folder (Linux: Open Directory; Mac: Show in Finder) |
| How to access the Firefox profile folder (Windows XP) | http://kb.mozillazine.org/Profile_folder_-_Firefox |
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What You'll Learn
How to prevent Firefox from generating thumbnails
Firefox users may want to prevent the browser from generating thumbnails of previously visited websites when they click on a new tab. This could be due to distractions, unprofessionalism, or personal information that pops up on those thumbnails.
To disable the thumbnails on the about:newtab page, follow these steps:
- Open the about:config page by typing it into the location/address bar.
- Accept the warning and click "I'll be careful" to continue.
- Right-click on the about:config page and open the right-click context menu.
- Choose "New > Boolean" to create a new Boolean preference.
- Name it "browser.pagethumbnails.capturing_disabled" and set the value to true.
- Create another new Boolean preference named "pageThumbs.enabled" and set the value to false.
Additionally, you may need to delete the thumbnails folder in the Firefox profile folder to remove any already stored webpage thumbnails. You can find this folder by going to "Help > Troubleshooting Information > Profile Directory: Show Folder" (on Linux and Mac, it is "Open Directory" and "Show in Finder," respectively).
By following these steps, you can prevent Firefox from generating thumbnails on the about:newtab page.
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How to delete stored thumbnails
Firefox users can disable the display of thumbnails of previously visited websites when they click on a new tab. This can be done by creating a new Boolean pref browser.pagethumbnails.capturing_disabled on the about:config page and setting the value to true. You can open the about:config page via the location/address bar. You will be prompted with a warning, which you can accept, and then click "I'll be careful" to continue.
To remove already stored webpage thumbnails, you will need to delete the files in the thumbnails folder. The location of the thumbnails folder depends on your operating system.
On Windows XP, the path to Firefox's thumbnail folder is:
C:\Documents and Settings\[Windows login/user name]\Application Data\Mozilla\Firefox\Profiles\z5sep971.default
Note that the path given above is just an example, and the specific path to the Firefox profile folder on your computer may vary.
On Windows 8.1, the thumbnails folder is not located in the profile folder. Instead, you need to check the location of the disk cache on the about:cache page and go to the parent directory.
Once you have located the thumbnails folder, simply delete the files inside to remove the stored thumbnails.
It is worth noting that some of the items in the folder are caches, and deleting them may temporarily slow down the performance of Firefox.
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How to disable thumbnails on the about:newtab page
If you want to disable the thumbnails on the about:newtab page in Firefox, there are a few methods you can try. One way is to create a new Boolean pref on the about:config page:
- Type "about:config" in the Firefox address bar and press Enter.
- Accept the warning and click "I'll be careful" to continue.
- Create a new Boolean pref: browser.pagethumbnails.capturing_disabled and set the value to true.
- You may also want to create another Boolean pref: pageThumbs.enabled and set the value to false.
This method should disable the display of thumbnails on the about:newtab page. However, note that Firefox may still generate and store thumbnails in the profile folder. To completely remove stored thumbnails, you need to delete the "thumbnails" folder in the Firefox profile folder. The path to this folder may vary depending on your operating system:
- On Windows XP, the path is typically C:\Documents and Settings\[Owner]\Local Settings\Application Data\Mozilla\Firefox\Profiles\z5sep971.default\thumbnails.
- On other Windows versions, the path may differ, and you may need to check the location of the disk cache on the about:cache page to find the parent directory containing the "thumbnails" folder.
Additionally, you can choose a different homepage for your new tabs or clear your cache and history to prevent Firefox from displaying thumbnails of previously visited websites. However, even with these methods, Firefox may still generate thumbnails, and you may need to periodically delete the "thumbnails" folder to remove stored thumbnails completely.
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How to find the thumbnails folder
To find the thumbnails folder on Firefox, you need to check the location of the disk cache on the about:cache page. Go to the parent directory to find the thumbnails folder.
On Windows, the path to the Firefox thumbnail folder is typically:
C:\
Note that NameOfUser refers to the name of your user profile.
For Windows XP, the path is slightly different:
C:\Documents and Settings\[Owner]\Local Settings\Application Data\Mozilla\Firefox\Profiles\z5sep971.default
Here, [Owner] refers to the name of the owner or user of the computer.
You can also access the Firefox profile folder by going to Help > Troubleshooting Information > Profile Directory: Show Folder (Linux: Open Directory; Mac: Show in Finder).
Once you've located the Firefox profile folder, you should see a "thumbnails" folder within it.
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How to remove thumbnails without clearing cookies
If you want to remove thumbnails from Firefox without clearing your cookies, there are a few methods you can try.
Firstly, you can change your new tab page. This can be done by following these steps:
- Open a new tab and type or paste 'about:config' in the address bar, then press Enter.
- In the search box, type or paste 'newtab' and wait for the list to be filtered.
- Double-click on the 'browser.newtab.url' preference and enter your preferred page. For a blank tab, enter 'about:blank'.
Alternatively, you can prevent Firefox from generating thumbnails for the 'about:newtab' page by creating a new Boolean pref. Here's how you can do this:
- Open the 'about:config' page via the location/address bar. You can accept the warning and click "I'll be careful" to continue.
- Create a new Boolean pref with the following details: name - 'browser.pagethumbnails.capturing_disabled', value - 'true'.
- Create another new Boolean pref with the following details: name - 'pageThumbs.enabled', value - 'false'.
You can also remove already-stored webpage thumbnails by deleting the 'thumbnails' folder in the Firefox profile folder. The path to this folder may vary depending on your operating system and Firefox version. For example, on Windows XP, the path is:
"C:\Documents and Settings\[Owner]\Local Settings\Application Data\Mozilla\Firefox\Profiles\z5sep971.default"
Within this folder, you will find the '\thumbnails\' folder, which you can delete to remove the stored thumbnails.
Please note that deleting cache folders may temporarily slow down Firefox's performance. Additionally, some versions of Firefox may store thumbnails in different locations, so you may need to check the location of the disk cache on the 'about:cache' page and navigate to the parent directory to find the 'thumbnails' folder.
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Frequently asked questions
To disable thumbnails on Firefox, you can create a new Boolean pref browser.pagethumbnails.capturing_disabled on the about:config page and set the value to true. You can also set the name: pageThumbs.enabled with the value: false.
You can open the about:config page by typing it into the location/address bar. If you see a warning message, you can confirm that you want to access the page.
To remove stored thumbnails, you need to delete the files in the thumbnails folder. You can find this folder by going to Firefox's profile folder: Help > Troubleshooting Information > Profile Directory: Show Folder (Linux: Open Directory; Mac: Show in Finder).
Yes, you can also find the thumbnails folder by going to about:cache and looking for the Cache Directory.
