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Which of the following is added to prefs.js,when open a dialog box each time an error occurs?

Which of the following is added to prefs.js,when open a dialog box each time an error occurs? Correct Answer user_pref(\"javascript.classic.error_alerts\", true);

Related Questions

Directions: Seven different boxes A, B, C, D, E, F and G of different colours viz., Orange, Pink, Purple, Yellow, Blue, Red and Green are arranged one above the other. The box at the bottom of arrangement is numbered 1, the above box is numbered 2 and so on. B is immediately above E. More than two boxes are above the Orange box. The Yellow box is immediately below A. Only one box is between the Orange box and F. G is immediately above the Red box. Only one box is between B and the Pink box. Only two boxes are between the Pink and the Green box. Only two boxes are between the Yellow box and the Orange box. The Purple box is neither at the top nor at the bottom of the arrangement.B is above Pink box. C is immediately above F. Neither C nor G is a Yellow box. G is not a Orange box. Question: Which combination represents the position of C and its colour?
Five boxes B1, B2, B3, B4 and B5 are placed one above the other in racks. The lowermost rack is numbered as one and just above the lowermost is numbered as two and so on. Each box is coloured with different colour such as L1, L2, L3, L4 and L5 (not necessarily in the same order). Two boxes are placed between L2 coloured box and L5 coloured box. Box B1 is not placed immediately above box B3. Box B4 is placed in the top most rack. L1 coloured box is placed immediate above L5 coloured box. Box B3 is coloured with L4. L5 coloured box is placed above L4 coloured box. Box B2 is coloured with L1. Which of the following boxes are placed immediately above and immediately below B5 box respectively?
Six boxes - A, B, C, D, E and F are placed around a circular table. Box C is placed fifth to the left box E. Box D is opposite to the box E. Box A is placed between box C and box D. Box B is placed adjacent to box E. Which box is exactly placed between box F and E?
Six boxes, M, N, O, P, Q and R, are kept one above the other but not necessarily in the same order. There is only one box between box N and box R. Box Q is immediately below box N. There are only two boxes between box Q and box M. There is no box above box P. Box R is third from the bottom. Which box is third from the top?
Seven boxes of different colours, Red, Yellow, Blue, Green, Orange, Violet and Indigo were stocked one on the other, not necessarily in the same order. No other box was placed below the orange box. The Violet box was placed second to the top of the Blue box. The Green box was second to the bottom of the Indigo box. The Red box was placed at the topmost position. The Yellow box was exactly above the Indigo box. Which of the following is the correct pair of box and its position?
Six boxes containing different items namely, Copy, Pen, pencil, Scissor, Tape and Paper, are kept in a straight line, one after the other, not necessarily in the same order. The box of Pen is kept at the third position in the line from the left end. The box of Paper is kept at the extreme right end. The box of Pencil is kept somewhere between box of pen and box of paper. The box of Tape is kept at the left of the box of Pen but at the right of the box of Copy, when counting from the left end. The box of scissor is not kept immediately next to Paper. Which box is kept at the second position from the right end?
There is a pile of six boxes. The weight of the topmost box i.e., 6th box is one fifth of the second box, the weight of the fourth box is \(33\frac{1}{3}\)% more than the weight of the first box, whose weight is thrice that of fifth box’s weight. Also, weight of second box is 2.5 times the fifth box. The third box whose weight is 720 gm is 60% heavier than the fifth box. What is the average weight of the three lightest boxes?
‘Grand Slam’ refers to winning certain major tennis tournaments in a single calendar year. The name of the tournaments are A. Australian Open, French Open and US Open B. Australian Open, French Open, Wimbledon and US Open.  C. French Open, US Open and Wimbledon D. French Open, US Open, Wimbledon and Olympic
Six boxes - A, B, C, D, E and F and all of them have different weights. Box B is not the heaviest. Box A is lighter than only one Box. Box F is heavier than both C and D. Box D is heavier than B but not heavy as C.  If Box E is the lightest then which of the following box is exactly between the heaviest and the lightest Box? 
In a warehouse, to keep 5 boxes A to E exactly one above the other, the following conditions are given: 1. Box A should be placed exactly three places above box D. 2. Box C should not be kept on the top. 3. Only one box should be kept between box E and box B. If box E is at the bottom, then what is the position of box C from the top?