As we know by the teachings of Hazrat Maulana Shah Hakeem Muhammad Akhtar sahab (db), that the safe guarding of eyes is very necessary in every process of our daily life.
It is equally important for persons using internet and it is a major issue as most of the websites have Ads containing unwanted pictures. By following this process, we can make our web browser safe from such content.
It includes customization for both Internet Explorer and Firefox Users.

For Internet Explorer Users

Step 1: To turn off images:
1. On the Internet Explorer menu bar:

• Select Tools.
• Select Internet Options.

2. In the Internet Options dialog box:

• Select the Advanced tab.

3. On the Advanced tab, under Settings: Multimedia:

• Turn the Show pictures setting on or off by selecting or clearing its check box.
• Click OK

Afterwards, to view one image without downloading the other images, right-click on the selected image and then click on Show Image.
Step 2: To turn off flash objects:
1. On the Internet Explorer menu bar:

• Select Tools.
• Select Internet Options.

2. In the Internet Options dialog box:

• Select the Programs tab.

3. On the Programs tab, click Manage Add-ons button:

• In add-ons list, select Shockwave Flash Object.
• In Settings panel, click Disable radio button.
• Click OK.

For Firefox Users

Step 1: ImgLikeOpera allows load only the images that you want in Firefox browser.
NOTE: There is also a functionality to whitelist certain domains, then that it won't block. Recommended behavior is to block all kind of images and then add proper websites in whitelist.
Tools -> Addons -> ImgLikeOpera -> Options -> Filters
Features:

• placeholders for blocked images
• (re)load image from context menu or Ctrl+rightMouseClick;
• forced expiration time (5 minutes - 3 months);
• policies for tabs;
• filters.

You can set one of policies for each tab:

• don't load images;
• load cached images only;
• load images for the originating Web site only;
• load all images.

Step 2: Flashblock is an extension for the Mozilla, Firefox, and Netscape browsers that takes a pessimistic approach to dealing with Macromedia Flash content on a webpage and blocks ALL Flash content from loading. It then leaves placeholders on the webpage that allow you to click to download and then view the Flash content.
You can get it from here
NOTE: There is also a functionality to whitelist certain domains, then that it won't block. Recommended behavior is to block all kind of object and then add proper websites in whitelist.
Tools -> Addons -> Flashblock -> Options -> Whitelist
Flashblock currently blocks the following content types:

• Macromedia Flash
• Macromedia Shockwave
• Macromedia Authorware