/r/F12

Browser preferences for editing:
Pictures are easier to edit in firefox but is do-able in chrome. Chrome and IE are best with editing text. Firefox sometimes doesn't work well with editing text and won't allow you to edit some things.

Editing text:

The easy (n00b) way:
1. Right click the words that you want to edit
2. Press "inspect element"
3. Double click the words, edit them, and press enter.

or:

1. Press F12 or Ctrl+Shft+I (not sure how it works with apple, I don't think you can on mac)
2. Press Ctrl+F
3. Type the words that you wish to edit
4. Once you find the words that you want to edit (depending on the browser, the wwords will often times be highlighted in some way on the webpage as well in the devtools bar)
5. Double click on them in the panel and you should be able to edit the text. Press enter once finished. If the words that you 	           typed do not appear, it is likely that you changed that word on a different part of the page (happens a lot with titles)

For pictures, you can do the same thing with inspect element and find the picture link that the site uses and then change the picture link to a link of a different picture.