While the Firefox web browser does not have that feature build in there is a Greasemonkey script with a similar functionality. Page Scroll is a script for the Greasemonkey extension for the Firefox web browser that will display transparent lines on all websites. It will display the lines on top by default and display the other lines if the user is working with the Page UP / Page Down keys, the mouse wheel or by dragging the scroll bar around.

This is however the only known script that is mimicking Opera’s Scroll Marker feature. Some users might not like the fact that the script is active on all websites by default. A right-click on the Greasemonkey icon and a selection of Manage User Scripts makes it possible to customize the sites list. Change the wildcard symbol to urls to activate the script only on those selected urls. Make sure to use wildcards yourself if the domain is making use of subdomains and directories.

Please note that the script seems to have difficulties on some websites to display the transparent scroll lines correctly. It should work on most sites perfectly however. Google Chrome users might get the script working in their web browser as well if they check the Google Chrome Greasemonkey article.

There is however another possibility that will suite many Veoh users. The Greasemonkey script “Adds a link to download original file for Veoh” makes it possible to download the video right of the Veoh portal without installing third party software to do the same. Once installed the Veoh page will contain a button named Get URL which will display the download link to the Veoh video next to it when pressed. That download link leads directly to the full version of the video on the Veoh servers.

It will download normally just like any other file in Firefox. It will most likely work in download managers as well but this has not been tested.

File sizes can be huge depending on the length of the video. Tests revealed file sizes for Veoh videos of more than 1.5 Gigabytes which might take a while to download considering that the downloads will not be with full speed usually. The average download speed was between 60 and 100 Kilobytes per file from the Veoh servers.

Megaupload is a file hosting service on the Internet that is displaying a captcha before the download link of a file will be shown on their website. The captcha is probably one of the easiest to recognize and fill out, pretty useless from the standpoint of defeating bots and annoying to users who download files from Megaupload regularly.

Megaupload auto-fill captcha is a Greasemonkey script for Mozille Firefox (and other compatible browsers) that will automatically fill out and send the captcha on Megaupload. This essentially means that the user does not have to enter the captcha nor click on a button to send it to the Megaupload server.

It practically feels as if there was not a captcha on Megaupload at all. A short explanation of Greasemonkey. Greasemonkey is a Firefox extension that can be installed just like any other extension in Firefox. Once the extension is installed it is possible to add so called userscripts to the web browser.

Those scripts are coded in JavaScript and change the behavior and look and feel of websites automatically.